Plants ca. 10 cm. Stem short, unbranched. Leaves petiolate; blade oblong-lanceolate in outline, 2–3-pinnate; primary pinnae 3–5 pairs; ultimate segments lanceolate or linear, 2–3 × ca. 1 mm, acute. Terminal umbels 12–15 cm across, lateral umbels 3–4 cm across; bracts 3–5, entire or apex 2–3-lobed; rays of terminal umbel 5–13, very stout, elongate, 8–13 cm, unequal and diffuse; bracteoles 5–10, apex 2–3-lobed or pinnate, rarely entire. Calyx teeth minute or obsolete. Fruit broadly ovoid, ca. 3 × 1.5–2 mm, tuberculate; vittae 2–3 in each furrow, 6 on commissure. Fl. and fr. Jun–Aug.
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