A queer little thing, but pretty and delicate, with a very short stem, mostly underground, bearing one or more slender, slightly hairy, dull yellow, scaly flower-stems from three to eight inches tall, each with a single flower, less than an inch long, with a dull yellow, hairy calyx, and a hairy, lilac corolla, tinged with dull yellow and veined with purple, with two yellow ridges in the throat. This is not common and is found across the continent.

One-flowered Cancer-root-Thalesia uniflora.