Seseli intramongolicum Ma

Plants 25–60 cm. Caudex branched. Stems several, dichotomously much-branched from base or middle, solid, terete, glabrous or minutely scabrid at base. Basal leaves numerous, long-petiolate; blade oblong or oblong-ovate, 2–20 × 2–7 cm, 2-pinnatisect; ultimate segments linear, 3–15 × 0.5–2 mm, glabrous, margins revolute, apex apiculate. Synflorescence thyrsoid, much-branched; umbels (1–)3–6 cm across; bracts absent; rays (2–)8–10, 0.3–1.2 cm, subequal, ridged, minutely puberulent; bracteoles 7–10, ovate-lanceolate, shorter than flowers, fused to each other at least at base, glabrous or minutely puberulent, reflexed; umbellules 7–15-flowered; pedicels 1.5–3 mm. Calyx teeth obsolete. Petals white, occasionally yellowish, costa fulvous, abaxially puberulous. Stylopodium conic, base undulate; styles reflexed. Fruit oblong, dorsally compressed, (3–)4–6 × (1.5–)2.5–3.5 mm, densely papillose-pubescent when young, glabrescent when mature; ribs filiform, prominent; vittae 1 in each furrow, 2 on commissure. Fl. Jul–Aug, fr. Aug–Sep.

Gansu (Hegang Shan), SW Nei Mongol (Ih Ju Meng, Zhuozi Shan), N Ningxia (Helan Shan).

Mountain slopes, dry stony places; 1500–2200 m.

Seseli intramongolicum là một loài thực vật có hoa trong họ Hoa tán. Loài này được Ma miêu tả khoa học đầu tiên năm 1979.

内蒙西风芹（学名：Seseli intramongolicum）是伞形科西风芹属的植物，为中国的特有植物。分布在中国大陆的内蒙古、甘肃、宁夏等地，生长于海拔1,500米至2,200米的地区，常生于山坡干燥地和石隙中，目前尚未由人工引种栽培。