Stem 1.17-2 ft. high, simple, thinly pubescent at the top, elsewhere glabrous; developed leaves in 2-4 pairs, spreading or reflexed, but ascending in some dried specimens, 2-6.5 in. long, 0.5-1.25 lin. broad, linear, acute, narrowed at the base, glabrous, minutely denticulate and ciliate on the infolded margins; umbel solitary, rarely 2, terminal, subglobose, densely 12-30-flowered; pedicels 0.33-0.5 in. long, shortly pilose; sepals 1.25-2 lin. long, 0.25-0.67 lin. broad, linear-subulate, lanceolate or ovate, acuminate; pubescent or shortly pilose; corolla-tube 0.75-1.25 lin. long, globose-campanulate, slightly constricted and densely bearded at the mouth, with the upper hairs ascending or converging and the lower deflexed, apparently yellow; lobes 1-2 lin. long, 0.75-1.25 lin. broad, spreading, but often appearing erect in dried flowers, oblong or ovate-oblong, obtuse, glabrous on both sides; corona-lobes shorter than the staminal column, 0.33-0.5 lin. long,0.5-0.67 lin. broad at the top, broadly cuneate, 3-toothed at the top, with the middle tooth short, very broad and bifid or deeply divided, lateral teeth minute; anthers erect around and equaling the truncate style-apex, hairy at their tips.
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Perennial, geophytic herb, stems usually unbranched, 350-610(-800) mm high. Leaves linear, 50-165 x 1.0-2.6 mm, glabrous, apex acute, margins minutely ciliate and in-folded. Inflorescences 12-30-flowered umbels. Flowers globose-campanulate, yellow; tube 1.5-2.6 mm long, slightly constricted at mouth, lower surface glabrous, densely bearded at mouth with upper hairs ascending and lower hairs deflexed; lobes oblong to ovate-oblong, 2-4 x 1.5-2.6 mm, both surfaces glabrous. Corona: lobes broadly cuneate, shorter than staminal column, with middle one of 3 teeth bifid. Anthers hairy at apex, approximately equal in length to style apex.
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