Erect, 6-10 in. high; branches virgate, slender, glabrescent; leaves mostly 3-nate, but occasionally also 4-nate on the same plant, subimbricate, erect, adpressed, suboblong, width more than 1/4 of the length, subacute, concave and midnerved above, round-backed and sulcate, the younger slightly pubescent, soon glabrous, about 2 lin. long; flowers axillary at the ends of the branches, spreading in a somewhat close pseudoraceme 1 in. or less long, 1/2 in. wide; pedicels 1 1/2 lin. long; bracts remote, small; sepals oblong-obovate, concave, keeled, subscarious, ciliate, 1 1/4 lin. long; corolla campanulate-tubular, neither inflated below nor constricted at the throat, pale yellow, 2-2 1/2 lin. long; segments somewhat spreading, 1/5-1/4 the length of the tube; anthers dorsifixed just above the base, oblong-recurved, obtuse and equal at base and apex, pallid, smooth, about 1/4 lin. long, aristate; pore 2/5 the length of the cell; awns squarrose on the upper part of the filament, short and ascending like cock's spurs; style included, stout below, tapering upwards; stigma simple; ovary glabrous.
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Erect shrublet to 60 cm. Flowers small, narrowly urn-shaped, pale yellow, in spikes.