Pimpinella niitakayamensis Hayata

Plants perennial, 10–40 cm, pubescent to nearly glabrous. Root cylindrical, ca. 10 × 0.3 cm. Stems little-branched or unbranched. Basal petioles 5–10 cm; blade oblong-ovate in outline, 4–8(–20) × 1.5–3 cm, 1-pinnate; pinnae 2–4 pairs, remote, sessile, broad-ovate or suborbicular, rarely 2–3-lobed, 10–20 × 5–15 mm, base truncate, margins dentate, apex obtuse or rounded. Cauline leaves few, 1–2-pinnate, pinnae lanceolate, deeply lacerate. Umbels terminal, (2–)5–7 cm across, occasionally lateral; bracts 1–3, linear-lanceolate, 5–8 mm; rays 6–8(–12), 2–3(–4) cm, hirsute; bracteoles 1–5, linear, 2–4 mm; umbellules 5–11 mm across, 6–8-flowered; pedicels 0.5–4 mm, very unequal. Calyx teeth obsolete. Petals white or cream, apex with small incurved lobule. Stylopodium short conic; styles ca. equal to stylopodium. Fruit ovoid, 2–3 × 1.5–2 mm, base cordate, surface glabrous; vittae 2–3 in each furrow, 4–6 on commissure. Seed face plane. Fl. May–Sep, fr. Aug–Oct. 2n = 18*, 20*.

Taiwan.

Mossy places in forests, grassy slopes; 2000–3500 m.