Arpitium alpinum (Ledebour) Koso-Poljansky.

Plants 12–20 cm. Taproot vertical, slightly thickened, branched. Stem well developed, single or 2–3, erect, striate, usually unbranched. Basal leaves petiolate, petioles 3–5 cm, sheathing, sheaths inflated; blade ovate or oblong-ovate, 3–5 × 1–2 cm, 2-pinnate, pinnae 3–5 pairs; ultimate segments linear or linear-lanceolate, 1–1.5 × 0.5–1 mm. Cauline leaves absent or 1–2, similar to basal, reduced, sessile. Umbels 2–3 cm across; bracts 6–8, lanceolate, margins white membranous; rays 10–15, subequal, 1–1.5 cm; bracteoles 8–10, lanceolate, margins white membranous, ca. equaling umbellules in flower, apex sometimes incised. Calyx teeth triangular. Petals white, cordate-ovate, base shortly clawed. Stylopodium subglobose; styles reflexed after flowering. Fruit oblong-ovoid, ca. 6 × 4 mm; vittae 1 in each furrow, 2 on commissure. Fl. Jun–Jul, fr. Jul–Aug.

Grassy slopes; 2400–2500 m. N Xinjiang [Kazakhstan, Mongolia, Russia (Siberia)].