Plants ca. 40 cm. Stem purplish. Basal petioles 7–9 cm, sheaths narrow-ovate; blade triangular in outline, 7–7.5 × 8–9 cm, 3–4-pinnate; ultimate segments linear, 2–4 × 1–1.5 mm. Umbels ca. 7–8.5 cm across, peduncles 4.5–12 cm; bracteoles 4–5, linear-lanceolate, 4–5 mm, scarious-margined, purplish-red; rays ca. 8, 2.5–4.5 cm, unequal; bracteoles 4–5, linear-lanceolate; umbellules many-flowered, pedicels short. Calyx teeth minute, triangular. Petals white or purplish-white, obovate, base narrow, apex with incurved tips. Young fruit ovate, ca. 1.7 × 2.2 mm; ribs filiform (mature fruit unknown). Fl. Sep.