Showing posts with label black-eyed susan. Show all posts
Showing posts with label black-eyed susan. Show all posts

Monday, August 27, 2012

A speedy way to wellness





Species name: Veronica longiflora

Common name: long-leaved speedwell

Location: Ontario

This plant is a "nearly native" wildflower common in roadside ditches and disturbed open fields. Unfortunately, it is a poor competitor in southwestern Ontario so is rarely found in large abundance in natural habitats for long since it is out-competed by native and non-native goldenrods, thistles, and other asters like daisies (likely the non-native ones), black-eyed susans, and Queen Anne's lace. This plant is very attractive to bees and other insects, and are an important food source in Canada for the Grizzled Skipper, a butterfly that actually builds itself a shelter when still a caterpillar to use at night and when it's not feeding. Pretty smart caterpillar!

Like all good things in botanical nomenclature, the genus Veronica is being reanalyzed using DNA sequencing to determine relatedness between species. The morphological variation between species in the genus is quite drastic, as are the habitats of each species, and geographic location. Since there seem to be at least two distinct groups, one having its origins in North America and the other having its origins in Australasia, it wouldn't surprise me if genetically those were two distinct genera as well. It's actually estimated that the 500 or so species of Veronica might actually fit into as many as 7 other genera once analysis is complete.

Since so many people consider this plant species a "weed" (I personally think it's actually quite attractive...), there is one good thing about this plant existing in urban areas. The entire plant is edible! The leaves reportedly taste a lot like watercress, so a peppery spinach. The flowers are also edible, but just make sure there aren't any bugs hiding in them or else you might have a nasty surprise when you bite into your salad. The roots and leaves when dried have commonly been used in traditional North American medicine in a tea that is consumed to relieve chest congestion. If you are going to attempt to eat this plant, just make sure you're not confusing it with another common species that grows in the same type of environment, skullcap. Skullcap is in the mint family and has square stems, speedwell is in the snapdragon family and has round stems. As with all wild plants, if you aren't 100% sure of the identification of the plant, don't eat it!

Monday, July 30, 2012

Black-eyed Susans rarely actually take a beating





Species name: Rudbeckia hirta

Common name: black-eyed Susan, yellow ox-eyed daisy

Location: Ontario

Black-eyed Susans are spectacular flowering plants native to southeastern Canada all the way south to Florida and Texas in the United States. There are four sub-species designating populations of plants in various locations, since the species range has become non-continuous due to land use change. It's an incredibly successful competitor and thrives in disturbed areas, so is often the first plant to colonize a recently abandoned field. Despite being able to out-compete almost all early successional field species, it does poorly in shade and so once shrubs and trees start to colonize the area it will quickly die out (or only remain in small patches). Anyone who has ever planted this plant in their garden knows about its ability to quickly colonize an area; keeping a patch of Black-eyed Susans under control feels like a losing battle (partially because, by definition, backyard gardens are disturbed areas which means this plant does exceptionally well).

Medicinally, this plant was used in almost the same way as the purple coneflower, Echinacea. The Ojibwa people used a paste-like liquid made from ground roots mixed with water as a treatment for snake bites, and made a tea-like infusion from the leaves and roots as a treatment for worms in children. The Menominee and Potawatomi people used the natural diuretic properties of this plant to flush toxins from the body. Because this diuretic effect is real, caution should be used when using this plant as an herbal medicine; over-use can result in severe dehydration which requires hospitalization. If this is not caught in time, permanent kidney damage or even death can occur.