Pimpinella flaccida C. B. Cl.

Specimens attributed to this taxon have been confused with Trachyspermum scaberulum. Further work is needed to clarify the status of this Indian species in China.

Plants annual, 30–60 cm, slender, sparsely puberulent. Taproot, 4–8 × ca. 0.3 cm. Stem branched from base. Basal petioles 0.5–3 mm; blade 1–2-ternate or 1-pinnate, pinnae 2 pairs; ultimate segments oblong-ovate or broad-ovate, 4–5 × 3–5 cm, margins crenate or coarsely serrate. Cauline leaves similar to basal, smaller, 3-lobed, lobes lanceolate. Umbels 2–3.5 cm across, spreading; bracts and bracteoles absent; rays 2–6, 0.5–2 cm, glabrous; umbellules 4–7 mm across, 2–8-flowered; pedicels 0.5–2, elongating to 10 mm in fruit. Calyx teeth obsolete. Petals white, obovate or ovate, apex with incurved lobule. Stylopodium low-conic; styles ca. 1 × stylopodium. Fruit ovoid, ca. 1 × 1 mm, base cordate, surface glabrous (occasionally papillose); vittae 3 in each furrow, 4–6 on commissure. Seed face plane. Fl. Apr–Jun, fr. Jul–Sep. 2n = 20*.

W Sichuan, NW Yunnan [NE India].

Forests, among shrubs, grassy slopes, alpine meadows; 2200–3800 m.

Pimpinella flaccida là một loài thực vật có hoa trong họ Hoa tán. Loài này được C.B. Clarke miêu tả khoa học đầu tiên năm 1889.

细软茴芹（学名：Pimpinella flaccida）为伞形科茴芹属的植物，是中国的特有植物。分布于印度以及中国大陆的云南、四川等地，生长于海拔2,900米至3,800米的地区，多生长于山谷草坡上以及林下，目前尚未由人工引种栽培。