Stem, simple, 1 1/4-2 ft. high, 1-1 1/2 lin. thick at the base, often compressed, scabrous or scabrous-pubescent, with internodes 2-4 1/2 in. long; leaves 3-6 pairs to a stem, ascending or suberect, subsessile or very shortly petiolate, 2 1/4-4 1/4 in. long, 2 1/2-8 lin. broad, broadly linear to lanceolate, acute or subacute, rounded or cuneate at the base, scabrous on both sides and at the narrowly revolute margins; umbel solitary and terminal or the stem forking once or twice dichotomously at the top and bearing 2-4 umbels, corymbosely arranged, 4-12-(mostly 7-8-) flowered; peduncles 1/4-2 1/4 or when solitary up to 7 in. long, scabrous-pubescent; 2-3 lin. long, linear-subulate, acute, thinly pubescent; pedicels 3-5 lin. long, scabrous-pubescent or subhispid; sepals 2 1/2-2 3/4 lin. long, 1-1 1/4 lin. broad, lanceolate, acute, subhispid-pubescent; corolla-lobes reflexed-spreading, 2 3/4-3 1/2 lin. long, 1 3/4-2 1/2 lin. broad, ovate, subacutely pointed, glabrous on both sides, apparently whitish, tinted with purple on the back; corona-lobes arising close to the base of the staminal column and equalling or slightly exceeding it, 1 1/2-1 3/4 lin. long, erect, about 1 lin. broad across the side, compressed-cucullate, truncately rounded at the top, rounded on the back, with the inflexed sides very slightly produced into obtuse teeth at the apex, no tooth or appendage within, yellow, with the basal part chocolate; staminal column 1 1/2 lin. long; anther-wings rectangularly angular at the middle; anther-appendages ovate to suborbicular, obtuse, with whitish granules embedded in them, producing a somewhat frosted appearance, closely inflexed over the concave style-apex.
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An erect herb. It grows 80 cm tall. It keeps growing from year to year. The stem is simple and unbranched. It is thick at the base. The leaves are simple and opposite. They only have short stalks. They are narrowly sword shaped with bristly hairs. The edges curve back. The flowers are in a group at the top of the plant. There are 4-12 flowers. They are small and 5 mm long and cream-coloured.
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