The Buckeye Battle Cry revisited

Species name: Aesculus glabra

Common name: Ohio buckeye

Location: Western University campus

I know I've written a blog about the Ohio buckeye before (you can read my previous blog post HERE), but I wanted to blog about it again but with better pictures. And you know what? I'm allowed, because it's my blog :) So there!

The Ohio buckeye is a native species (well, marginally native. Definitely native to the northeastern United States; debatable whether or not it's native to southwestern Ontario) that does very well in full sun to partial shade. It's a medium-to-small tree in this part of Ontario because it's growing in a suboptimal part of its range, but further south into Ohio and Kentucky it can be a medium sized tree (up to 25 meters tall). The roots of these trees can tolerate intense rain and can tolerate temporary flooding, but do best in well-drained soil. There are some clear disadvantages to growing the Ohio buckeye as an ornamental species, and the first should be obvious: the fruit produced. If you're trying to increase the squirrel population, growing buckeyes in your yard is one of the best things you could possibly do. You don't want to come between a hungry squirrel and a buckeye tree! If, however, you have a lawnmower that you appreciate using and not replacing the blade every time you cut the lawn, you might want to reconsider this species. The fruits produced are enormous (in ideal conditions, some are almost the size of baseballs!), and when they split open they release one to three seeds. The seeds are large, hard, and really hurt when they hit you in the head. They do make fantastic ornaments, and are really stunning in flower arrangements. You can also collect the seeds and dry them to make beads, as is popular to do at Ohio State University. I can imagine they would be good for building neck muscles because they're so heavy, although I'm not sure why you would want to build your neck muscles.

Something that is often believed about the buckeye is that it produces inhibitory chemicals from the roots to prevent the growth of other species (called allelopathy) like in Norway maples and, to some extent, black walnuts. Fortunately, this isn't the case. To date there's no evidence that buckeyes produce allelopathic chemicals from their roots. Unfortunately, that doesn't mean that anything will grow under them! The canopy cover of buckeyes is just so dense that even shade-tolerant grass has a really hard time growing under buckeye trees. The best thing to plant under them would be highly shade tolerant ground cover, but even that might not do it in the long run. But the trade-off? Look at the trees! They're spectacular in their own right. They also turn bright orange early in the fall (late summer, really), long before other species start to change colour. And who doesn't love a bright orange tree in a sea of green?!

So how did the buckeye get to be so closely associated with Ohio? Well, there's the obvious reason that Ohio is the middle of the range for the buckeye, but that in its own right rarely causes a plant to be so ingrained in a state's culture. The story goes that Colonel Ebenezer Sproat arrived in what is now the United States in 1788 to command the Northwest Territory. Once he landed, the Indigenous peoples called Colonel Sproat "Hetuck" because they were so greatly impressed by him; he showed the native people immense respect and communicated with them instead of at them (as so many others did, and, to some extent, continue to do). To Indigenous North Americans, hetuck means the "eye of the buck" which shows power, respect and knowledge. I guess being called the eye of the buck is a great honour! He eventually became known as the "Big Buckeye" and all of the citizens under his control were his buckeyes. Eventually it became a term associated with all of those from and living in Ohio. The common name of the buckeye also stems from the fact that the seeds (or the "nuts") of the tree also resemble the eyes of deer. I bet you'll never look at a buckeye seed the same way again!

Should you decide to try to grow your own buckeye, make sure you find some nice plump seeds before they fall out of the fruit. They are very, very sensitive to drying and won't germinate if the seeds dry out too much. The best way to get around this is to find a fruit that has split open but has not yet dropped the seeds and take them home and put right in the ground. They won't germinate until the next spring, but there's usually a pretty good success rate. Plant a few, then pull all but a couple out of the ground in the summer. At the end of the next summer, choose your favourite and pull all of them but that one out (or leave a bunch! Nothing wrong with wanting a few buckeyes). Just keep in mind that you can't grow these indoors before transplanting (at least, not easily); they do require a period of exposure to extreme cold during the winter in order to germinate properly in the spring. Oh, and invest in a good rake ;)

Sisal here, sisal there, everywhere a sisal sisal...

Species name: Agave sisilana

Common name: agave, sisal

Location: teaching lab at Western

So once again we have a plant in a pot (the next few blogs will all be plants in pots) from my favourite course ever. This plant is from the same lab exercise as the previous one, flax (which you can read all about HERE). The point of this lab was to introduce students to five major fibres and where the come from, as well as providing them with visual representations of what the plants actually look like since most are pretty foreign concepts to the average undergrad student. The five plants we feature are hemp (not as a plant, but we have a huge display about hemp cultivation and harvesting, as well as products commonly made, and some uncommonly made, from hemp), flax/linen, banana/musa, sisal/agave, and cotton. We also feature products made from each of these plants so the students actually get to touch the fibres to see what they feel like, and why one might be used for one thing over another (for example, it would be extremely unlikely for you to want to wear a pair of jeans made out of sisal, but some made out of hemp would be lovely).

Sisal, also commonly called "agave" after it's Latin name, is native to the Yucatan area in Mexico where it is still commonly cultivated (and found in the wild) today. There are many, many other countries that cultivate this plant for its fibres, not the least of which being my favourite country to visit in the whole wide world: Cuba. The story of how they started farming sisal is actually a funny one! Back in the "good old days" (the 1600s and 1700s, not the 1980s), world exploration was quite the hot topic everywhere in the world. Cuban people, whether it be immigrants to Cuba who have now called it home for decades or native Cubans who have lived there for centuries, were big into exploration after Christopher Columbus piqued their interest (he made landfall in Trinidad in Cuba, where he was attracted by all of the same plants he found in the Dominican Republic). They set sail for the west, hoping to come across something exciting and they did: Mexico. What they observed there was fascinating to them; people turning plants into beverages, and then singing and dancing after consuming those beverages. I don't know about you, but it sounds like a fun time to me! Cubans agreed, and offered to buy some of these plants off of their hands; Mexico refused. So what's a Cuban to do when you want to make the "happy drink" but they won't give you the plant to make it? Why you steal it, that's what you do. Minor detail: the plant in question was the plant called Agave tequilana, or perhaps even Agave americana, not Agave sisilana. Since pretty much all green spiky plants look the same after an over-indulgence of tequila, you can probably understand how they got the two mixed up. Once they brought the plants back to Cuba, grew them, and tried fermenting them into alcohol they were likely sorely disappointed since the resulting beverage would taste nothing like Mexican tequila (it's much more bitter, and would be a much darker brown). They quickly rectified their mistake by becoming one of the world's most important producers of sisal fibres around the world, used to make marine ropes and twine. At least it wasn't all for nothing!

Sisal has recently come back into fashion as an alternative plant to grow in an area, especially in tropical countries, when you're letting a field plot go to rehabilitate the soil as it out-competes weeds and animals avoid eating it because of its physical defenses. It will just happily grow, producing long strands of fibres in the leaves without any kind of human intervention. Even harvesting the plant for fibre is non-destructive; you simply cut the leaves from the stem and leave the stem to grow more leaves. Most commercial sisal varieties are sterile, meaning they will never produce the flower stalk that is so characteristic of other members of the genus Agave (which you can read all about HERE or a closely related plant in a different genus HERE). Should those flowers have been produced, the flower stalk could also be used as a source of fibre. Like with the tequila agave, once the flower stalk is produced and the flowers are pollinated, the entire plant dies so there is incentive for sterile varieties to be grown to prolong the life of the plant.

Aside from rope, there are many uses for sisal and even more are being discovered now that varieties of sisal can be produced in the lab that make longer, softer fibres. Sisal is now commonly used to make paper, dartboards, scouring cloths and sponges, filters, carpets, and even some texturized wall coverings (paints and wallpapers). Sounds like a great plant! The one major downside in using this plant as a fibre source is the amount of waste: only about 4% of the total mass of the plant are useable fibres. The rest is all waste that is composted (rarely) or burned (more likely). The odd time the burning of sisal waste will turn into a dirty fuel, but more often than not it's just set on fire in the field and the ashes are spread around after the pile has been burned off. There are now efforts into looking at how microbial decay by bacteria can be used to turn sisal wastes into biogas, or methane.

While not officially a state "tree" (not actually a tree, despite the ability to produce a stem that looks quite woody, as it is a monocot), it appears on the coat of arms of the state of Yucatan in Mexico, and Barquisimeto in Venezuela.

RERUN: Canada's National Tree

Since today is Canada Day, I figured I should either do a post that has to do with this great country, or at the very least re-post the blog I did last year on this day. Last year's blog it is! A new blog post continuing the "Sandra's Garden" theme will be coming shortly. To keep you tied over until then, enjoy this post from Canada Day last year about the differences between sugar maples (our National tree) and Norway maples (an invasive species). Happy Dominion Day!

Species names: Acer saccharum, Acer platanoides

Common names: Sugar maple, Norway maple

Location: Ontario

Since one of these trees is native and the other is not, and there's a reason why one would be featured more prominently over the other on a wonderful day such as today, I put up the photo for a native species.

Since today is Canada Day, I figured I should probably feature our national tree, the one proudly flown every day on our flag, the sugar maple (a species that I didn't quite do justice to in this blog post). Unfortunately, the Norway maple has become almost as common as the sugar maple in Canada (if not more common in some areas) because it is, for some obscure reason, planted in preference over our native species. Perhaps it's because it doesn't succumb to the native sugar maple pests that we have, but it was also the reason why we have periodic outbreaks of the Asian longhorned beetle, its primary pest, which is decimating forests across the country. The other downside of the Norway maple is that it produces phytochemicals from its roots that deter understory growth (including grass, if you choose to plant one in your front yard), and when fully mature it can inhibit the growth of native species of trees and shrubs in a forest to such an extent that you sometimes find "Norway maple oases" where nothing else exists.

So how can you tell the difference between a native sugar maple and an invasive, non-native Norway maple? The key is in the leaves. First, if you've got a purple maple tree in your front yard you've got a Norway maple. Sugar maples have never been bred to have purple leaves, so that's a great place to start to be able to stay away from the Norway maple. Second, take a look at the lobes of the leaf, specifically the top lobe. Does it have deep groves running almost halfway down the leaf, separating the top lobe from the ones on each side of it? Or is the lobe very shallowly separated from the rest of the leaf? Shallow lobes are Norway maple leaves, deep lobes are sugar maple leaves. If you look at the second picture (sugar maple on the left, Norway maple on the right), you can also see that when you compare them side-by-side the number of teeth along the leaf's edge also differs quite a bit; the Norway maple has quite a few more teeth along each lobe where the sugar maple doesn't. Third, take a look at where the petiole (or the "leaf stalk") branches off into the main veins of the leaf. Are these veins approximately the same colour as the tissue of the leaf, or is there a drastic difference in colour? As in the third picture, veins roughly the same colour as the leaf is seen in the sugar maple, drastically different leaf main vein colouring is characteristic of the Norway maple. The last and most easy method for telling the two species apart is by breaking a leaf off the stem and looking to see what happens. Is there a white milky latex that oozes out of the petiole? Or is the base of the petiole dry? The Norway maple is the one producing latex, the sugar maple doesn't (and that latex can be irritating to the skin, so be careful!).

Now you know how to tell the two trees apart. And not to leave out my American friends, the sugar maple is also the state tree of New York, West Virginia, Vermont and Wisconsin. All four of those states have impeccable taste in trees! :)

Happy Canada Day!

Allz you ever wanted to know about Rhododendrons

Species name: Rhododendron sp. (perhaps a cultivar or variety of R. wardii but I'm not positive)

Common name: rhododendron

Location: Sandra's garden

Rhododendrons are really gaining popularity in North America as garden plants, especially those species that are native to this continent. Most gardeners aren't actually aware that we have many native North American species of rhododendron, since the most widely available and easiest to grow are those native to China (like this one probably is), Japan, Korea and Taiwan. Rhododendrons prefer acidic soil which is most commonly found under very old coniferous trees. So if you have some pruned firs, spruces or pines (so that the lowest branches are several feet off the ground and the base of the tree receives a fair bit of sunlight) and want to plant something under them, rhododendrons would be a good bet! Just make sure they will receive enough sunlight; they do best in full sun. Make sure you take care in paying attention to what species you're planting and where you live; various species of rhododendrons can be highly invasive in locations where they are not native.

If you grow your own honey, which is also gaining in popularity with gardeners with large yards since bee populations are on the decline, it is strongly suggested that you do so only when your bees wouldn't have ready access to rhododendrons (and other species in the same genus that we call azaleas because the flowers only have five anthers instead of the usual ten; you can read my previous blog about azaleas HERE). The pollen and nectar of rhododendons contains a toxin called grayanotoxin, which can cause hallucinogenic and laxative effects. Not exactly the kind of thing you're expecting when you consume honey! Horses have an even more extreme reaction to grayanotoxin: it can cause seizures and even death. Thankfully for horses, they usually avoid rhododendons based on the smell alone and would rather look for something else to eat. Cats and dogs also have adverse effects to rhododendrons, but the effect is much more pronounced in dogs than in cats (are cats smarter for staying away from the plant more often? Perhaps. Is this my bias for what pet I prefer more? Perhaps...). Dogs like to chew on sticks, so if you prune this plant and leave the sticks laying around your beloved pet might be in for a surprise. Symptoms include digestive issues, heart palpitations, heart attack, and liver failure. Eventually these symptoms will lead to death if the animal is left untreated. Supervise your pets around your landscape plants!

Rhododendron species are very important to different cultures around the world. For example, different species of rhododendron are the national flower of Nepal, the state flower of both Indian-administered and Pakistan-controlled Kashmir, the state tree of Sikkim and Uttarakhand in India, and the state flower of West Virginia, Pennsylvania, and Washington in the United States. Not bad for a plant!

Colorado Blue Spruce

Species name: Picea pungens var. hoopsii

Common name: Hoopsii spruce, Hoopsii Colorado Blue spruce

Location: Ontario

I had wanted to post back-to-back blogs to contrast the difference between spruces and firs, since many people when they're first starting out at plant identification (me included) have a hard time telling them apart. I didn't get a chance to post a blog yesterday and I had a different blog planned for today, so I guess I'll just have to post two blogs today :)

The Colorado spruce, as I'm sure you can guess, is native to the alpine regions of Colorado in the United States. It has been transported all around the world by humans, favoured for its blueish tint to the needles at the tips of the branches. As the branch grows and the needles age, they lose their waxy frosting that gives them the blue tint, and turn green. The Colorado spruce is very intolerant to shade, and so the needles on the inside of the tree are shed as they become too shaded by branches above them. While the Colorado spruce is a popular Christmas tree, all spruces lose their needles when the tree dries out, so they can be very messy by the time it's time to compost the tree. The needles compared to fir trees, which don't lose their needles when dry, are also much sharper and not as nice to handle, and can be quite dangerous to small children with sensitive skin and to animals (compare the photos of the needles above to the needles in my blog post about the white fir HERE). Spruces also don't smell as wonderful as fir trees do; the typical "Christmas smell" that I think of when I think of Christmas is cinnamon, apples, the smell of fir trees, and a roasting turkey. Yum!

This variety of spruce tree is actually quite misleading when it comes to the "typical" form of spruces. It actually looks absolutely nothing like a typical Colorado spruce, and actually much more like a black spruce (which you can read all about HERE). Black spruces, except when young, have this type of characteristic shape; very dense branch growth towards the top of the tree that point almost straight outwards but with very short branches, then the longer branches towards the bottom of the tree are much longer, droop downwards, and are much more sparse compared to the top of the tree. The Colorado spruce, on the other hand, should be shaped almost like a pyramid with very dense branches throughout the length of the tree, and branches pointing nearly straight outwards. The Hoopsii spruce, a variety of the Colorado spruce, was selected by humans to have that drooping, very narrow growth habit.

As for the uses of the Colorado spruce, it is rarely used in the lumber or paper and pulp industry unless it is found growing in a stand of trees intended for pulping. It grows incredibly slowly and adds very little girth with each growing season, so is not very useful for lumber. The Navajo use the bark from the Colorado spruce as a medicinal item; it is steeped like a tea with other herbs to treat various medical conditions. The Colorado spruce is also the state tree of Utah and (of course) Colorado.

The mighty white oak

Species name: Quercus alba (hybridized with...?)

Common name: white oak

Location: Ontario

I took this photograph of a white oak on campus, and I doubt it's a "pure" white oak. The swamp oak (which you can read about HERE) and the white oak are not only very closely related species, but they also readily hybridize. For anyone to sell a "pure" white oak, I would like to know how they did it. Collecting acorns in the wild and growing up trees in a nursery (then repeatedly harvesting nursery acorns and replanting to grow up your stock) will almost always result in hybridized white oaks. And if the tree nursery also grows swamp white oaks, they've compounded their problem. In fact, oak pollen is so light and can travel so far on wind currents that you don't even have to know where a swamp oak or a white oak are to get them to hybridize. Like the issue with the Freeman maple (which you can read about HERE), once these two species hybridize they often get intermediate features, or a "blending phenotype." Oak pollen is actually one of the leading causes of seasonal allergies in the spring. Anyone living near an oak tree can attest to this; my dark grey car often takes on a yellow tinge because of our big red oak growing in the front yard.

The white oak, no matter its genetic background, has been used for centuries as one of the most prized woods in the world. Because of the structure of the cells in the wood, it is completely watertight when used for making furniture or other items. These same cellular structures make it rot-resistant, which is why it is so popular in the use of barrel construction; the liquid won't leak out of the barrel, and if it does start to become saturated with the liquid inside it won't rot and release the contents. Not cracking and breaking apart is probably preferred during the alcohol aging process! It's not just wine that's stored in oak barrels, but also rum and whiskey. Since some rums are aged for 20 years or more (an Appleton Estates rum to be released this year is a 75 year aged rum, all done in oak barrels), putting them in a barrel that's likely to rot or leak is probably not preferred! The watertight and rot-resistant characteristics also make oak a popular wood historically for shipbuilding and agricultural construction (both equipment and barns).

On the inside of homes, oak is a popular wood for visible finishings. Sometimes cabinets are made out of a different kind of (cheaper) wood, then the front facings are oak. Oak flooring is also incredibly popular, and often it's even stained to resemble other, more expensive woods (like cherry, walnut or mahogany). In fact, most mahogany flooring sold today in Canada is just white oak wood stained a reddish colour, since international trade treaties have been signed preventing the import of South American tropically-grown mahogany wood into Canada. Since the term "mahogany" doesn't actually apply to any one species of tree (unlike wood from black walnut, white oak, sugar maple, white pine, etc.), that eliminates many options for sourcing mahogany! While I'm sure mahogany is incredibly popular to use for fine furniture and household finishings, South American rain forests are being eliminated at an alarming rate for both the international wood trade, and conversion to the North American style of farming (higher productivity for a few years, but then a drastic decline in productivity due to the low level of nutrients in the soil). By preventing the import of these trees, we are doing our part in attempting to conserve the tropical forests in South America.

There are some notable famous white oaks across the United States. The first isn't one tree, but actually an entire grove of white oak trees. The USS Constitution is made entirely of white oak, and whenever parts of it need to be replaced they come from a grove of trees called Constitution Grove near Bloomington, Indiana. The states of Connecticut, Maryland and Illinois have all made the white oak their state trees, with one specific oak representing the honorary tree of the state. The Charter Oak in Connecticut is even featured on the back of their state quarter (which I, of course, proudly own since it features a botanical design). The honorary state tree of Maryland, the Wye Oak, was one of the oldest living trees in the United States until it was destroyed in a storm in 2002. In Illinois, they couldn't decide which tree they liked better to serve as their honorary white oak so they picked two; the first is on the front lawn of the governor's house, and the second is in a school yard. The new largest living white oak is the Linden Oak, also located in Maryland.

The "little sister" pine

Species name: Pinus resinosa

Common name: Red pine, Norway pine

Location: Ontario

Surprisingly enough, the common name of this species is not reflective of its natural heritage. Sure, it's an economically important tree in Norway, but it certainly didn't originate there and more than likely wasn't first discovered there, either. The red pine is native to Canada and the northeastern United States, is the state tree of Minnesota, and is much smaller in almost every respect compared to the eastern white pine.

It is relatively uniform in its morphology, so you'll rarely see "exceptions" to the general shape, size, colour, and rate of maturation of any one member in a population. This would suggest that each member of the population is very genetically similar, and that each copy of each gene has few alleles (and perhaps only one allele expressed in two copies). How does this happen? Well, there's only one way: near extinction. This very concept has happened recently with the cheetah and also the eastern cougar. The populations are so genetically uniform that very strange genetic deformities are starting to appear more and more commonly in the population. In a "pristine" population, one that hadn't gone through a near-extinction event, genetic diseases are rare and you usually need two copies of a gene to express the disease. If you only had one copy, you would appear normal, and no copies you would appear normal and any children you had would also appear normal (since no matter what genes they get from your mate, you will be passing on one of your two normal copies of the gene to your children). Because an individual with one normal copy and one recessive copy appears normal, selection cannot act to "weed" that individual out of the population. If that individual mates with another individual that has one normal copy and one recessive copy of the gene, they have a 1/4 chance of having a child with the disease. The same thing happens in plants, but many plants can be what we call tetraploid; this means they have four copies of each gene instead of only two. You can see how this might be of great advantage in the plant kingdom; in order to show the effects of a recessive gene, you would need to have four copies of the gene instead of just two, which would occur much less commonly.

The presence of a large number of red pine trees in an area is usually indicative of a widespread natural disaster of some kind, usually a forest fire. Because they are incredibly intolerant of shade, they are often the first trees to colonize an area after fire. Contrary to popular belief, this isn't because the seeds require intense heat to open (which is the case in some other coniferous species). When you intensely burn an area it rapidly decomposes the dense organic layer on top of the soil which allows for easier seed penetration, it burns off insects that might eat the seeds or young saplings, it removes the competitive ability of understory trees and shrubs by killing all (or some) of them, and thins out the branches of the trees that make up the canopy. Fires provide optimal growth conditions for the red pine and other primary colonizing species that are shade intolerant.

The uses of the red pine include lumber, pulp and paper, and for landscaping purposes.

Birch bark canoes in tree form

Species name: Betula papyrifera

Common name: paper birch, white birch

Location: Ontario

This tree species is incredibly common in Canada, from the northern edge of the Carolinian forest north to the tree line. Despite being a deciduous tree, it is most common in coniferous forests like the Boreal forest. It is not shade tolerant, so is one of the first species to colonize an area that has been burned or deforested. It is also a popular ornamental tree for the attractive bark: white, peeling bark on the trunk, and reddish-brown bark on the twigs.

There are a few notable uses of the white birch. The first is in the lumber and construction industry. While the lumber generated from a white birch is not ideal for building anything other than ornamental pieces (chairs, tables, etc.), chipping the trunks and pressing them into boards gives OSB or oriented strand board, which is incredibly important in the housing industry. It is used most commonly as sub-flooring in homes (and as wall panels on which to attach other decorative surfaces), but also sometimes as sub-roofing (but is not very water resistant and so requires a membrane before the roof can be shingled). By far, the most substantial use of white birch today is in the manufacture of (drumroll) popsicle sticks.

There are unusual pockets of boreal forest that exist in the middle of the United States that are likely remnants from the last major ice age. Because it is now (more than likely) too warm for the white birch to happily exist in those locations, it is listed as threatened or vulnerable (or some variation thereof) in seven states: Tennessee, Colorado, Wyoming, West Virginia, Virginia, Illinois and Indiana. It is the provincial tree of Saskatchewan and the state tree of New Hampshire.

Historically, it was very important to Native North Americans as a canoe tree. There were two different kinds of canoes built from this tree, depending on the intended use. The first is to cut down a large tree and hollow out the inside to make a thin shell. These types of canoes weren't very common since finding trees large enough to do this is rare. Using bark pieces to form a waterproof barrier and shaping around a frame made of thin branches was much more common, and is still done in some areas today (although more of an ornamental canoe as opposed to one used for fishing and transport).

The Buckeye Battle Cry

Species name: Aesculus glabra

Common name: Ohio buckeye

Location: Ontario

It should come as no surprise to find out that this tree is native to Ohio and the surrounding area. In fact, Ohioans are so attached to this tree it is not only the mascot of Ohio State University, but also the state tree. They've even gone as far as making an official state candy called the buckeye that mimics the tree's fruit. The "nativeness" of this plant is currently up for debate. Up until last year, I would have put the "non-native" status, but there was one stand of trees of Ohio buckeye discovered on Walpole Island in Ontario very recently. There has also been the suggestion that other individuals in Ontario might appear to have been planted but are actually free-growing. Either way, if these trees are native or not this is the northernmost extreme edge of the growing range.

The fruits of these plants are quite large and dangerous-looking due to their long spines. The seeds that the fruit contain are brown and very smooth, and are sometimes dried and used as beads for necklaces. The seeds contain tannic acid, which is one of the components of the process of tanning leather. These seeds are only one of many sources, and they were used for this purpose in the 1600s. The outer husk of the seed was also sometimes removed and the inner flesh boiled, mashed, then pan-fried in small patties. This food was called "hetuck"and was reported to be regularly eaten. I find this hard to believe, since it's actually rather well reported that the seeds of the Ohio buckeye tree are poisonous. Perhaps the method in which they were cooked denatured any biologically-active toxins.

Like humans, cows also show a severe sensitivity to chemicals in the buckeye seed, and so caution should be exerted before planting this species on a farm. Unfortunately, cows actually seem to be attracted to buckeye fruit so poisonings and death of livestock are routine occurrences in the fall when the plant sheds the seeds.

Canada's National Tree

Species names: Acer saccharum, Acer platanoides

Common names: Sugar maple, Norway maple

Location: Ontario

Since one of these trees is native and the other is not, and there's a reason why one would be featured more prominently over the other on a wonderful day such as today, I put up the photo for a native species.

Since today is Canada Day, I figured I should probably feature our national tree, the one proudly flown every day on our flag, the sugar maple (a species that I didn't quite do justice to in this blog post). Unfortunately, the Norway maple has become almost as common as the sugar maple in Canada (if not more common in some areas) because it is, for some obscure reason, planted in preference over our native species. Perhaps it's because it doesn't succumb to the native sugar maple pests that we have, but it was also the reason why we have periodic outbreaks of the Asian longhorned beetle, its primary pest, which is decimating forests across the country. The other downside of the Norway maple is that it produces phytochemicals from its roots that deter understory growth (including grass, if you choose to plant one in your front yard), and when fully mature it can inhibit the growth of native species of trees and shrubs in a forest to such an extent that you sometimes find "Norway maple oases" where nothing else exists.

So how can you tell the difference between a native sugar maple and an invasive, non-native Norway maple? The key is in the leaves. First, if you've got a purple maple tree in your front yard you've got a Norway maple. Sugar maples have never been bred to have purple leaves, so that's a great place to start to be able to stay away from the Norway maple. Second, take a look at the lobes of the leaf, specifically the top lobe. Does it have deep groves running almost halfway down the leaf, separating the top lobe from the ones on each side of it? Or is the lobe very shallowly separated from the rest of the leaf? Shallow lobes are Norway maple leaves, deep lobes are sugar maple leaves. If you look at the second picture (sugar maple on the left, Norway maple on the right), you can also see that when you compare them side-by-side the number of teeth along the leaf's edge also differs quite a bit; the Norway maple has quite a few more teeth along each lobe where the sugar maple doesn't. Third, take a look at where the petiole (or the "leaf stalk") branches off into the main veins of the leaf. Are these veins approximately the same colour as the tissue of the leaf, or is there a drastic difference in colour? As in the third picture, veins roughly the same colour as the leaf is seen in the sugar maple, drastically different leaf main vein colouring is characteristic of the Norway maple. The last and most easy method for telling the two species apart is by breaking a leaf off the stem and looking to see what happens. Is there a white milky latex that oozes out of the petiole? Or is the base of the petiole dry? The Norway maple is the one producing latex, the sugar maple doesn't (and that latex can be irritating to the skin, so be careful!).

Now you know how to tell the two trees apart. And not to leave out my American friends, the sugar maple is also the state tree of New York, West Virginia, Vermont and Wisconsin. All four of those states have impeccable taste in trees! :)

Happy Canada Day!