Rhizome 0.5-1 cm diam.; roots fibrous. Leaves annual, few, 5-7 cm long, ciliate-margined, withering before flowering. Stems perennial, several, erect to spreading, monopodially to pseudodichotomously branched, 20-50 cm long, ridged, with tuberculate hairs on ridges. Umbels 1-3-flowered; pedicels 8-10 mm long, articulated just above level of bract apices. Perianth segments 11-12.5 mm long. Sepals linear, 3-4 mm wide. Petals elliptic, 4 mm wide; fimbriae 3-3.5 mm long. Stamens 6; anthers twisted, 3 outer 3 mm long, 3 inner 6-7 mm long and curved. Style curved, declinate in same plane as longer anthers, 10 mm long. Seeds ellipsoidal, 2 mm long, 1.5 mm diam.; aril yellow.
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