Sandra's Garden: Vancouver's Centennial

Species name: Pelargonium x hortorum 'Vancouver Centennial'

Common name: 'Vancouver Centennial' geranium

Location: Sandra's garden

Geraniums themselves (not real geraniums, of course, but Pelargonium plants) are incredibly popular garden plants around the world. I've blogged about a red-flowering cultivar already, and you can read all about it HERE. This cultivar, however, is a special type of hybrid that has then been selectively bred for leaf shape and leaf colour. The first time I had ever seen this specific cultivar was in Sandra's garden. Since then, I've seen it literally everywhere I've looked. Isn't it funny how things like that happen? Someone brings your attention to something, then you start noticing it a lot more often.

Contrary to what you might think, this cultivar was not created in Canada (despite being named after Canada's famous Vancouver, not one of the United States' many, many Vancouvers) but in the United States. Rumor has it that it was named in honor of Vancouver's 100th birthday, which would have officially been in 1986 (the city was officially incorporated using the name "Vancouver" in 1886; prior to that it was Gastown which was settled in 1867 and grew to become the town of Granville until the renaming in 1886). I'm not sure if this is true or not, but a nice story. The leaf shape was selected by growers to minimize the "frilling" that can be seen in most geranium cultivars, and the leaf colour was selected based on the maximum amount of red that could be bred into the plant until it was no longer healthy and couldn't survive. Leaves are green for a reason; the pigments in the leaves responsible for photosynthesis (the creation of sugar from carbon dioxide, water and light energy) end up giving the leaf its green colour. If you maximize the amount of pigments other than chlorophyll you end up decreasing the plant's ability to make its own sugar, resulting in a weakened plant. At the end of the day, the amount of green and reddish pigment balance that optimized a visually-pleasing leaf but also enough green to maintain the plant's photosynthetic ability was about half-and-half: the green around the border of the leaf and the red on the inside. The decreased frill also ended up with a leaf that is strikingly similar to a maple leaf, giving this plant its other common name: the maple-leaved geranium.

Like many non-native plants, this cultivar of geranium is incredibly slow-growing (which is unlike many of its relatives which are fast-growing) and very sensitive to too much and too little water. Until the plant becomes established in the soil, periods of drought can be seriously detrimental to the health of the plant. Once established, flooding and standing water are its biggest enemies. Surprisingly, this cultivar is much more cold-tolerant than its relatives so will last further into the fall than the average geranium will. It is still frost-sensitive and definitely won't tolerate snowfall or freezing, so there is no need to worry about the potential for becoming invasive (at least in Canada).

Probably not the chenille you want to knit with

Species name: Acalypha hispida

Common name: chenille plant

Location: UWO Greenhouse

The chenille plant, also called the Philippines Medusa and the fox tail, is native to a set of small islands off the coast of Australia, between Australia and Indonesia. It has now been domesticated throughout much of the world with a warm climate year-round (it is not frost-tolerant) such as the southern United States, Mexico, Brazil, and Belize. It is still common throughout all of its native range, and much of its naturalized range.

The chenille plant can almost be considered a domesticated plant in some areas. It no longer does well in the wild in some spots it has been introduced because we (as humans) have subjected it to artificial selection to favour traits we like. The inflorescences, while usually having quite a bit of "fur" on them, were much shorter and much less hairy in the wild ancestors than the ornamental varieties sold today. This is considered artificial selection as this would never have happened naturally in the wild; increasing the hairiness of the inflorescences actually decreases the plant's ability to disperse their seeds. Not a good thing if you're the plant! There are also some cultivars of ornamental plants that have orange and even yellow inflorescences as opposed to the "natural" red colour (but this has also been artificially selected for increased intensity).

The family that this plant belongs to is called the Euphorbiaceae, or the spurge family (sometimes the euphorb family). The easiest way to determine if a plant belongs to this family is if it produces a milky white latex from the leaves when they are broken (which you can see dried on the leaf's surface in the third photo). If so, chances are much higher it belongs to this family than not. If you have sensitive skin like I do, you'll also probably find out the hard way that euphorb latex is extremely irritating to sensitive skin, completely separate of whether or not you have a traditional latex allergy. This should probably suggest to you that perhaps this plant shouldn't be consumed if it has the ability to burn your skin on contact, and you would be correct. The chenille plant is deadly toxic to small animals, and would make any human that tried to eat it very sick. If you have cats, you might want to reconsider before buying this plant (either to plant outside or as an indoor plant); my cat would mistake the inflorescences for cat toys in a heartbeat and it would likely be a deadly mistake.

Pink: a flower, a colour, AND a verb!

Species name: Dianthus plumarius

Common name: Garden pinks, Wild pink

Location: Ontario

The Dianthus genus is part of the Pink or Carnation family, and are a group of species native to Asia and Europe (with the exception of one species that is native to arctic North America). I haven't read any documentation about their invasive potential, so we'll give them the benefit of the doubt. This specific species of plant can only tolerate well-drained soil, but especially in the late fall and early spring as the roots near the surface of the soil freeze easily. It prefers mostly alkaline soil.

The carnation family is a great example of human-induced "artificial selection" that would actually cause the plant more harm than good in the wild. The specific variety of Garden Pink that we have growing in our garden is called a "double" variety, meaning that the breeders have selected for double the number of petals in each flower. Because the petals also have feather-like edges, it makes the flowers look much more full than they actually are. This flower really only has 10 petals! This in itself isn't necessarily a detriment; having more petals won't harm the plant unless it has to have a trade-off with another flower characteristic. In the case of this specific variety, the trade-off has also been exploited: the stamens (the pollen-producing structures) have been completely replaced with non-functioning petal-like ornamentations. Bees and butterflies are still attracted to them for their nectar, but they cannot transfer pollen from flower to flower so very little seed is produced. This plant would never survive on its own in the wild if it wasn't able to reproduce asexually.

Fun fact for Dr. Grumpy (who's blog I'm an avid reader of): there was a boat in WWI in the US Navy Patrol that was called the USS Dianthus. It was named by the owner, John P. Crozer, and retained the name by the Navy while they were using the vessel. I have no idea why the boat was named what it was, but I like to think Mr. Crozer chose Dianthus because the "SS Carnation" sounds a little...girly.