Stem 1.5-2.5 ft. high, subterete, sometimes slightly 2-edged below each node or at the base, glabrous; developed leaves erect, 1-2 in. long, 0.25-0.5 lin. broad, linear, acute, minutely ciliate-denticulate on the margins, glabrous; umbels 4-6 to a stem, erect, racemosely arranged, all rather distant, 3-5-flowered; peduncles 2-7 lin. long, glabrous; pedicels 0.25-0.5 in. long, glabrous; sepals 1-1.25 lin. long, lanceolate, acuminate, glabrous or with a few hairs on the back; corolla-tube 1.25-1.5 lin. long, campanulate, faintly constricted at the mouth, densely bearded at the mouth with converging hairs and with 5 tufts of deflexed hairs at the throat within, otherwise glabrous; lobes suberect, 1-1.25 lin. long, about 0.75 lin. broad, oblong-ovate, acute, glabrous on the back, thinly or densely bearded with hairs at the apex and along within the margins to the base, and thinly sprinkled with scattered hairs or subglabrous on the middle part; corona-lobes 1.25 lin. long, reaching to or shortly exserted from the mouth of the corolla-tube, broadly or transversely rhomboid at the 0.5-0.67 lin. broad basal part, 3-toothed, lateral teeth minute, middle tooth broad-based, prolonged into a slender filiform point much longer than the basal part, connivent-erect high above the 0.5 lin. long staminal column; anthers sub-quadrate-ovate, tipped with a few hairs.
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