Carum delicatulum H. Wolff in H. Limpricht, Bot. Reis. Chin. 449. 1922; Cryptotaeniopsis affinis H. Wolff; C. delicatula (H. Wolff) H. Wolff; Pternopetalum affine (H. Wolff) M. Hiroe.

Plants 30–45 cm. Stem single, unbranched and glabrous. Basal leaves petiolate, petioles up to 25 cm; blade triangular-ovate in outline, 6–8 × 3–8 cm, 1-pinnate; pinnae 3–4-paired, ovate, broadly ovate or lanceolate, 2–3.5 × 1.2–1.8 cm, veins and margins sparsely strigose, abaxially pale green, margin incised-serrate. Cauline leaves absent or occasionally 1. Umbels usually terminal, 2.5–3 cm across in flower, 3–5 cm in fruit; bracts absent; rays ca. 30, 1–3 cm; bracteoles 2–3, ca. 0.4 mm; umbellules 2–3-flowered; pedicels to 2 mm. Calyx teeth subulate, ca. 0.4 mm. Petals white. Stylopodium conic; styles elongate; stylopodium plus styles 0.3–0.5 mm. Fruit ovoid, 2–3 × 1–1.5 mm; ribs finely scabrid; vittae 1 in each furrow, 2 on commissure. Fl. and fr. Apr–Sep.

Forests; 800–3000 m. Guizhou, Sichuan, NE Yunnan.