岩生棱子芹 yan sheng leng zi qin

Aulacospermum rupestre Popov, Byull. Moskovsk. Obšč. Isp. Prir., Otd. Biol. 44: 129. 1935.

Plants 20–50 cm, glabrous. Root conic. Stem simple or little-branched. Basal and lower petioles 8–18 cm, flattened, sheaths narrow-oblong; blades ovate, 3–5 × 1.5–3 cm, 2–3-pinnate; pinnae 3–5 pairs, sessile; ultimate segments linear-lanceolate, 2–5 × 1–2.5 mm, acute. Leaves reduced upwards. Umbels 5–10 cm across; bracts 4–7, linear-lanceolate, 1–2 cm; rays 4–7, 2–5 cm, unequal; bracteoles 4–6, lanceolate, 5–10 mm, pale green, apex entire, acute; pedicels 10–20, 3–5 mm. Calyx teeth small, triangular. Petals ovate-obovate, white, ca. 1 mm. Stylopodium yellow-brown, short-conic. Fruit broad-ovoid, 3–5 mm; ribs all broadly sinuolate-winged; vittae 3 in each furrow, 6 on commissure. Fl. Jul, fr. Aug.

Rocky mountain slopes; 2500–3500 m. NW Xinjiang [Turkmenistan].

This rather poorly known taxon is possibly conspecific with Pleurospermum simplex.