Description from Flora of China
Selinum baicalense I. Redowsky ex Willdenow, Enum. Pl. 1: 306. 1809; Kitagawia baicalensis (I. Redowsky ex Willdenow) Pimenov; Peucedanum polyphyllum Ledebour.
Plants 30–100 cm. Stem solitary, erect. Basal leaves numerous; blade oblong, 2–3-pinnatisect; pinnae 4–5 pairs, long-ovate, pinnatisect, pinnules 2–3 pairs; ultimate segments narrowly linear, 2–10 × 0.8–1 mm, both surfaces glabrous, glaucous, entire, apex apiculate, petioles sheathing throughout, rachises pubescent. Leaves reduced upwards, uppermost subulate. Synflorescence corymbosely branched; umbels 3–4(–10) cm across; bracts 1–3, lanceolate, glabrous and scarious; rays 10–15, 1–2(–4) cm, inner face puberulent, outer face glabrous; bracteoles 6–8, linear-lanceolate, white scarious, longer than or about equaling flowers; umbellules 8–10-flowered. Calyx teeth small, acute. Petals white. Styles longer than stylopodium. Fruit ellipsoid, 3–4 × 2.5–3 mm, glabrous; dorsal ribs prominent, lateral ribs winged, wings ca. 1 mm, ca. 1/3 width of body, thin; vittae 1 in each furrow, 2 on commissure. Fl. and fr. Jul–Sep.
Sandy or stony slopes in Pinus woods; 200–800 m. Heilongjiang, Nei Mongol [Mongolia, Russia (Siberia)].