This is a member of a circumboreal complex seemingly undergoing speciation even as we speak. Our populations are highly localized with the host plant along streamsides in wet and boggy high-altitude meadows. At Donner they occur in a small part of the Lake VanNorden Meadows and also on a couple of small boggy meadows upslope from Clair Tappaan Lodge and Cal Lodge. At Castle Peak they occupy a small portion of Castle Valley.