4-7 ft. high; branches stout, rigid, erect, cano-puberulous, all except the lowest parts densely leafy; leaves 4-nate, erect-spreading, crowded, imbricate, oblong, obtuse, thick, rigid, sulcate, glabrous, gland-ciliolate, 2-4 lin. long; flowers 4-nate, on short branchlets; pedicels 3 lin. long; bracts approximate, scarious, acute, the two upper longer than, and exceeding in height the sepals; sepals erect-incurved, broad-ovate and obtuse to broad-lanceolate and acute, subscarious, 2-2 1/2 lin. long, somewhat shorter than the corolla; corolla urceolate, throat slightly constricted, of thick texture, white, about 2 1/2 lin. long; segments slightly spreading, broad, rounded, yellow, a little less than 1/2 the length of the tube; filaments tapering from a broad base, flexuous; anthers included, dorsifixed almost at the base, cuneate, brown, about 1/2 lin. long, narrow-crested; pore 3/4 the length of the cell; crests subulate, acute, serrulate, about 1/2 the length of the cell; style included; stigma subsimple; ovary glabrous.
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Erect shrub to 2 m. Flowers small, globose, calycine, white.