A perennial herb with yellowish-green foliage and smooth, upright stems. Grows and flowers under the hottest conditions. Flowers whitish or cream-colored, in small, flattened clusters at the tops of stalks; each small flower with 5 sepal lobes resemble petals, these emerge from a disk around the ovary; 5 stamens are inserted in the disk. Blooms May–July. Leaves narrow, oblong, alternate, stalkless, to 1½ inches long, green on both sides.
