双生栓翅芹 shuang sheng shuan chi qin

Cachrys didyma Regel, Trudy Imp. S.-Peterburgsk. Bot. Sada 5: 601. 1878; Cryptodiscus didymus (Regel) Korovin; Neocryptodiscus didymus (Regel) Hedge & Lamond.

Plants 40–60 cm. Root ca. 1 cm thick. Stem hispid, especially below, branches opposite or cyclic. Basal petioles 5–7 cm; blades broad-ovate, 10–15 × 5–10 cm, 3–4-pinnate; pinnae 6–7 pairs, triangular-ovate; ultimate segments linear-lanceolate, 3–8 × 0.5–1.2 mm, entire, hispid. Umbels 2–5 cm across; peduncles 3–9 cm; bracts 1–3, linear-lanceolate, 3–9 mm, hispid, deciduous; rays 4–6, 1.5–5 cm, equal, glabrous; bracteoles 5, linear-lanceolate, 1.5–4 mm, hispid; pedicels 6–10, 3–7 mm, elongating to 15 mm in fruit. Petals white, ca. 1.5 mm, hispid abaxially. Ovary smooth. Fruit subspherical, 5–9 × 6–10 mm; ribs all inconspicuous. Fl. Apr–May, fr. Jun. n = 11.

Desert grasslands, dry slopes, gravels; 400–1300 m. W Xinjiang [Kyrgyzstan, Tajikistan].