Family, Crowfoot. Color, blue purple. Petals, small or none. Sepals, large, thin, with prominent veins, widely spreading, giving the purplish color to the flower. Outer filaments often flat, like small petals. Peduncles, long, springing from the axils of opposite leaves, or terminating the branches, bearing a single flower. Fruit, of many long, plumose styles. Leaves, trifoliate on long and slender petioles, the leaflets entire or slightly toothed, somewhat heart - shape, sometimes lobed. May and June.
A woody-stemmed climber or trailing vine found in rocky woods, especially in limestone districts, from Virginia northward. If one comes across this climber in the woods of Connecticut, as I have done, he has found a real treasure, a rare and beautiful flower.