Plants 18–25 cm. Taproot short. Stem dark purple, little-branched. Basal petioles 4–5 cm, slender, sheaths oblong; blade triangular, 2.5–4 × 2–3.5 cm, 2–3-ternate/pinnate; pinnae 5–7 pairs; ultimate segments long-ovate to obovate-lanceolate, 4–6 × 2–3 mm, base cuneate, irregularly serrate distally. Umbels 5–8 cm across; peduncles 3–7 cm; bracts and bracteoles usually absent; rays 6–10, 3–5 cm, unequal, slender; pedicels unequal. Calyx teeth minute, ovate. Petals purple-red, rarely white, long-obovate, 1.2–1.5 × ca. 1 mm. Anthers dark purple. Young fruit broadly ovoid, ca. 2 × 1.5 mm (mature fruit not known). Fl. Aug–Sep, fr. Oct.
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