Ostericum maximowiczii (F.Schmidt) Kitag.

Plants 40–100 cm. Rhizome inconspicuous or slender and creeping. Stem 2–5 mm thick, thinly ribbed, sparingly branched above, glabrous or sparsely hispidulous. Basal and lower leaves petiolate, petioles 3–10 cm, sheaths narrow; blade triangular-ovate, 7–16 × 5–13 cm, 2–4-ternate-pinnate; ultimate segments linear to ovate-lanceolate, 1–4 × 0.5–0.9 mm, glabrous or hispidulous along nerves. Middle and upper leaves reduced, sheaths purplish, inflated. Umbels 3.5–7 cm across; bracts 1–3, broad-lanceolate, 5–8 mm, scarious-margined; rays 10–17, hispidulous; bracteoles 5–7, linear-lanceolate, acuminate; umbellules 10–30-flowered; pedicels glabrous. Calyx teeth broadly triangular-ovate, hispidulous. Petals suborbicular, base clawed. Fruit broad-ovoid, 4–5.5 × 3.5–5 mm; dorsal ribs prominent, marginal ribs broad-winged, broader than the body; vittae 1 in each furrow, 2–4 on commissure. Fl. Aug–Sep, fr. Sep–Oct.