Thursday, August 4, 2011
Listera cordata on the Berg Lake Trail
Another tiny orchid, easy to miss, but blooming everywhere along the Berg Lake Trail in Mount Robson Provincial Park is Listera cordata, the Heart-leaved Twayblade. Its flowers are tiny but unique with their forked lip and are easily identifiable by that feature as well.
There are two varieties of this orchid, and the variety which we saw here is almost certainly variety nephrophylla. The whole nomenclature thing is a little confusing since both varieties have both a green and a red form, both of which we saw on this hike along one of our favorite trails.