Tongoloa silaifolia (H. Boiss.) H. Wolff

Some authors consider this taxon to be conspecific with Tongoloa stewardii. It has reputed medicinal value (in Shaanxi).

Plants 28–60 cm. Root brown, conic. Stem purplish, branched. Basal and lower petioles 6–12 cm, sheaths oblong-inflated; blade broadly ovate, (3–)5–8 × (2–)4–6 cm, 2–3-ternate/pinnate; pinnae short petiolulate; ultimate segments linear, 5–18 × 1–2 mm, apex acute. Primary umbels 3–12 cm across; bracts absent; rays 8–22, 3–6 cm, subequal; bracteoles usually absent or 1–5, linear, shorter to longer than the flowers; umbellules 10–25-flowered, ca. 1 cm across; pedicels unequal. Calyx teeth minute, ovate or semi-orbicular. Petals long-obovate, purplish-red sometimes white, 1–1.2 × ca. 0.8 mm. Anthers pur-plish-red, sometimes white. Stylopodium dark purple, short-conic. Fruit broadly ovoid, ca. 1.8–2.2 × 1.2–1.5 mm; ribs filiform. Fl. Jul–Sep, Fr. Sep–Oct. n = 8*.

Chongqing, Qinghai, Shaanxi, Sichuan, Yunnan.

Damp grasslands; 2200–4000 m.

Tongoloa silaifolia là một loài thực vật có hoa trong họ Hoa tán. Loài này được (H. Boissieu) H. Wolff miêu tả khoa học đầu tiên năm 1925.

城口东俄芹（学名：Tongoloa silaifolia）为伞形科东俄芹属的植物，是中国的特有植物。分布在中国大陆的四川、陕西等地，生长于海拔2,230米至3,350米的地区，见于潮湿的草地，目前尚未由人工引种栽培。