丝叶芹 si ye qin

Carum setaceum Schrenk in Fischer & C. A. Meyer, Enum. Pl. Nov. 1: 61. 1841; Bunium setaceum (Schrenk) H. Wolff; Conopodium setaceum (Schrenk) Korovin.

Plants 50–80(–120) cm. Tuber globose, ca. 1.5 cm across. Stem thinly ribbed, branched. Basal and lower leaves long-petiolate, withering at flowering, petiole 2–6 cm, sheath narrow, clasping; blades broad-ovate, ca. 13 × 8 cm, 3–4-pinnate, finely divided; pinnae all petiolulate; ultimate segments linear-filiform, ca. 10 × 1–2 mm, entire. Cauline leaves sessile, ultimate segments longer and narrower, 10–20 × 0.2–0.5 mm. Umbels 2.5–6 cm across; peduncles 2.5–7 cm; bracts 2–6, 1.5–6 × ca. 0.15 mm, unequal; rays 6–20, 0.4–3 cm, very unequal; bracteoles 2–6, 1–3 mm, unequal, shorter than flowers; pedicels 10–25, 1–5 mm, unequal. Petals ca. 1 mm. Fruit 2–4 × 0.4–1.8 mm, brown. Fl. May–Jun, fr. Jul–Aug.

Shrubby thickets, grassy slopes. W Xinjiang [Afghanistan, Kazakhstan, Kyrgyzstan, Tajikistan].

This species is often included within Bunium Linnaeus on account of the globose tuber.