Family, Milkweed. Colors of corolla, white, with purple spots near the center; of hoods, purplish or reddish. Flowers, in 1 to 4 close umbels on peduncles, terminating the stem, or rarely in the upper axils. Leaves, in pairs, or the middle ones sometimes whorled, oval, pointed at apex, rounded at base, contracted into short petioles. Plant, 1 to 3 feet high May and June.