Annual or probably short-lived perennial herb branching from near the base, to ± 30 cm. high, seldom more, glabrous or the stem pilose with short curved hairs, the whole plant sometimes tinged red.. Leaves densely crowded, sessile, oblanceolate, to 25 × 7 mm., apex rounded, margin entire.. Cymes occasionally axillary, usually in terminal 3–5-branched umbels, with primary rays to 4 cm. long, forking ± 5 times; bracts sessile, deltoid, to 1.5 × 1.5 cm., seldom larger.. Cyathia on peduncles to 1 mm. long, 1.8 × 2 mm., with cup-shaped involucres; glands 4, spreading, transversely oblong, 1 mm. broad, with 2 horns to 0.8 mm. long; involucral lobes ovate with 2-lobed apex, 0.8 mm. long, margin minutely ciliate.. Male flowers: bracteoles linear, ciliate; stamens 2.5 mm. long.. Female flower: styles 1.5 mm. long, joined at the base for 1/3, erect, bifid to almost halfway.. Capsule exserted on a glabrous or pilose pedicel to 3.5 mm. long, deeply 3-lobed, 2.7 × 3.2 mm.. Seeds ovoid, 1.5 × 1.2 mm., smooth, reddish black, with a cream, wrinkled caruncle, 0.6 mm. across.
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