Scouler’s Corydalis

Beautiful and extremely rare in Canada, the Scouler’s corydalis is found only on southwest Vancouver Island around the Nitinat, Carmanah, and Klanawa valleys in Ditidaht and Huu-ay-aht territories. With delicate pink-purple flowers and bright feathery leaves that look like stylized green flames when first emerging, this relative of the bleeding-heart flourishes in the rich soils along the banks of the rivers as well as disturbed areas.

Scouler’s corydalis has some interesting strategies for distributing its seeds. When jarred, the elastic seedpods will hurl the seeds up to 2 metres away from the parent. Fascinatingly, the seeds of the corydalis are sheathed in a lipid-rich layer (called an eliaosome) that contain proteins, sugar, and vitamins, which is not believed to be for feeding the baby plant, but for ants!

Ants are thought to harvest these seeds and take them back to their nests, where they strip off the fatty, nutritious coating to feed to their offspring and toss the seed onto their rubbish heap. This nutrient-rich substrate provides the infant seed with ideal growing conditions and the new colony of corydalis gets a headstart in the ant colony’s waste management site. That same seed coating that is so delectable for ants is believed to taste repulsive to deer mice, a handy way to deter these rodents which might otherwise eat the seeds.

Scouler’s corydalis is provincially blue-listed with only 24 known occurrences in Canada. Not only are they rare, they’re also ephemeral, with the plant dying back in the summer after seeding. The beauty of this unusual plant is present for only a few short months in spring, one of the countless wonders of our incredible coastal rainforest. If you see it, savour the experience!