6. DRÀBA, Dill. WHITLOW-GRASS. Pod oval, oblong, or even linear, flat; the valves plane or slightly convex; the partition broad. Seeds several or numerous, in 2 rows in each cell, marginless. Cotyledons accumbent. Filaments not toothed.--Low herbs with entire or toothed leaves, and white or yellow flowers; pubescence often stellate. (Name from δράβη, applied by Dioscorides to some cress; meaning unknown.) § 1. DRABÆ̀A. _Petals not notched or cleft; perennial or biennial, leafy-stemmed, flowers white, pods twisted when ripe._ 1. D. ramosíssima, Desv. _Diffusely much branched_ and forming many radical tufts, perennial (5--8´ high), pubescent; _leaves laciniate-toothed_, linear-lanceolate, the lower oblanceolate, racemes corymbosely-branched; _pods hairy_, oval-oblong or lanceolate (2--5´´ long), on slender spreading pedicels, tipped with a _long style_.--Cliffs, Harper's Ferry, Natural Bridge, etc., Va., to Kentucky River, and southward. April, May. 2. D. incàna, L. _Hoary-pubescent_, biennial or somewhat perennial, the radical tuft seldom branching; leaves oblanceolate or the cauline lanceolate to ovate, few-toothed or entire; _pods oblong to lanceolate, usually acute and straight, often pubescent_, on short erect pedicels; style very short or none.--Dry rocks, Willoughby Mountain, Vt.; also northward and far westward. (Eu.) Var. arábisans, Watson. Caudex much branched; pod glabrous, acuminate or acute, twisted, beaked with a longer distinct style. (D. arabisans, _Michx._)--N. Vt. to western N. Y. and the shores of the upper lakes. § 2. DRABÉLLA. _Winter annuals; leafy stems short; flowers white (yellow in n. 5); style none. (Leaves oblong or obovate, hairy, sessile.)_ 3. D. Caroliniàna, Walt. Small (1--5´ high); leaves obovate, entire; peduncles scape-like; petals usually twice the length of the calyx; _raceme short or corymbose in fruit_ (½--1´ long); _pods broadly linear, smooth_, much longer than the ascending pedicels.--Sandy and waste fields, E. Mass. to Minn., and southward. March--May.--Petals often wanting in the later racemes, especially in the var. MICRÁNTHA, Gray, with minutely rough-hairy pods, which is found with the other, westward. 4. D. cuneifòlia, Nutt. Leaves obovate, wedge-shaped, or the lowest spatulate, toothed; _raceme somewhat elongated in fruit_ (1--3´), at length equalling the naked peduncle; petals emarginate, much longer than the calyx; _pods oblong-linear, minutely hairy, longer than the horizontal pedicels_.--Grassy places, Ill. to E. Kan., and southward. March, April.