碱蛇床 jian she chuang

Cnidium salinum var. rhizomaticum Y. C. Ma; Kadenia salina (Turczaninow) Lavrova & V. N. Tikhomirov; Ligusticum salinum (Turczaninow) Koso-Poljansky; Selinum dubium (Schkuhr) Leute subsp. salinum (Turczaninow) Leute; S. salinum (Turczaninow) Vodopianova.

Plants perennial or biennial, 20–50(–70) cm. Root 3–6 mm thick; nodes sometimes inflated. Stem solitary, striate. Basal and lower petioles 5–10 cm; blade oblong-ovate, 6–12 × 3–10 cm, 2–3-pinnate, rarely 1–2-pinnate; ultimate segments linear-lanceolate or falcate, 5–30 × 1.5–3 mm, margins slightly revolute. Umbels 3–6 cm across; bracts caducous or occasionally one persistent, linear; rays (6–)10–15, unequal, slightly scabrous inside; bracteoles 4–6, linear, longer than pedicels, margins narrowly membranous, slightly scabrous, not ciliate. Petals white or pinkish. Stylopodium low-conic; styles 2–3 times longer than stylopodium, reflexed. Fruit oblong-ovoid, 2.5–3 × ca. 1.5 mm. Seed face plane or slightly concave. Fl. Jul–Aug, fr. Aug–Sep.

Damp grasslands, wet meadows. Gansu, Hebei, Heilongjiang, Nei Mongol, Ningxia, Qinghai [Mongolia, Russia].