Plant 3-15 in. high, or rarely taller, with 1-3 simple or branched stems, puberulous with usually rust-coloured or golden-brown minute curved hairs, or sometimes the leaves and corolla nearly or quite glabrous; leaves in 4-8 pairs; petiole 1/2-1 lin. long; blade 3/4-2 1/2 in. long, 1/6-1 in. broad, linear-oblong, lanceolate, broadly oblong or ovate-oblong, acute or obtuse and mucronate, broadly rounded to slightly cordate at the base, often somewhat crisped at the scabrous margins; umbels 2-6 to a branch, rarely solitary, lateral and terminal, racemose or sub-corymbose, 5-10-flowered; peduncles 1/2-2 3/4 in. long; bracts few, 1-3 lin. long, filiform or setaceous; pedicels unequal, 1/3-1 in. long; sepals 1 3/4-2 1/2 lin. long, 1/2-2/3 lin. broad at the base, tapering to a very acute point; corolla-lobes rotately spreading or somewhat reflexed, 2 1/2-3 1/2 lin. long, 1 3/4-2 lin. broad, elliptic or elliptic-oblong, minutely notched at the subacute point, glabrous on the inner face, brilliant green (Wood); corona-lobes arising 1/2-3/4 lin. up the staminal column, complicate, subdeltoid or obliquely, or somewhat deltoidly subquadrangular viewed sideways, top margin sloping downwards and outwards, about 1 lin. high, 1 1/4-1 1/2 lin. broad, narrowly rim-margined at the truncate base, in dried flowers with the top margins horizontally spreading, forming a broad flat rim or margin, without a cavity, but fissured between the very acute or slightly hooked teeth into which the inner apical angles are produced; staminal column 2-2 1/2 lin. long; anther-appendages small, suborbicular, obtuse, erect, inflexed at their tips on the rim of the truncate style-apex; fruit about 3-3 1/4 in. long, 1/2-2/3 in. thick, lanceolate-fusiform, obtusely beaked, with 4 longitudinal serrate wings, rusty puberulous when young; seeds about 2 1/3 lin. long, 1 1/4-1 1/3 lin. broad, thick, with incurved margins, forming a deep groove on one side, very convex on the other, rugose all over with minute tubercles and thin ridges, dark brown.
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Differs from the typical variety as follows: Stems mostly solitary. Leaves ovate to broadly elliptic. Corona: lobes as above but with a shallow or deep grooved sinus. Follicle 100-115 mm long.