Trachydium delavayi Franchet, Bull. Soc. Philom. Paris, sér. 8, 6: 110. 1894; Chamaesium novemjugum (C. B. Clarke) C. Norman var. delavayi (Franchet). C. Norman.

Plants 10–20(–33) cm. Root branched. Basal petioles 2.5–5 cm; sheaths broad, long-ovate; blade oblong in outline, 3–6 × 1.5–2.5 cm; pinnae 4–6 pairs, overlapping; ultimate segments broadly ovate or suborbicular, 8–15 × 6–13 mm, base truncate, apex obtuse, 2–3-crenulate. Umbels 4–5 cm across; bracts and bracteoles absent; rays 5–6, 1–3 cm, unequal; pedicels 8–17, 2–4 mm. Calyx teeth suborbicular, small, obscured by stylopodium. Petals obovate or orbicular, white or yellowish, ca. 1.8 × 1.2 mm. Fruit oblong-ellipsoid, 2–2.5 × ca. 2 mm; ribs prominent. Fl. and fr. Aug–Oct.

Grassy slopes; 3500–4000 m. Sichuan, Yunnan.