Hymenidium giraldii (Diels) M. G. Pimenov & E. V. Kljuykov

This taxonomic boundaries between this species and Pleurospermum hookeri var. thomsonii are unclear as the character of obsolete calyx teeth is not reliable and the degree of dissection of the bracteoles is somewhat variable. All parts of the plant are used medicinally to cure stomach ache (in Shaanxi).

Plants 20–35 cm, glabrous. Root dark brown, 0.5–1 cm across, branched. Stem tinged purple, ribbed, simple or little branched. Basal and lower leaves long-petiolate, sheaths membranous; blades triangular-ovate, 5–8 cm, 3–4-ternate-pinnate; ultimate segments linear, 1.5–3 × 0.3–0.5 mm. Leaves gradually reduced upwards, petioles becoming almost wholly sheathing. Umbel often 1, rarely 2–3, 3.5–4.5 cm across; bracts 5–7, ovate-elliptic or obovate, 15–20 × 5–8 mm, white or tinged purple, membranous; rays 9–15, 1.5–2.5 cm; bracteoles 5–7, obovate, longer than flowers, margin white membranous to first lobes, apex pinnatisect; pedicels 18–30, 2.5–3.5 mm. Calyx teeth minute, triangular. Petals obcordate, white, ca. 1 mm. Stamens longer than petals, anthers purple-black. Fruit oblong, 3.5–4 mm; ribs winged; vittae 3 in each furrow, 6 on commissure. Fl. Jul–Aug, fr. Sep–Oct.

Gansu, Hubei, Shaanxi, Sichuan.

Grassy mountain slopes; 3000–3600 m.

Pleurospermum giraldii là một loài thực vật có hoa trong họ Hoa tán. Loài này được Diels miêu tả khoa học đầu tiên năm 1900.

太白棱子芹（学名：Pleurospermum giraldii）为伞形科棱子芹属的植物，是中国的特有植物。分布在中国大陆的甘肃、陕西、湖北、四川等地，生长于海拔3,000米至3,600米的地区，常生长在山坡草地，目前尚未由人工引种栽培。