锐齿西风芹 rui chi xi feng qin

Plants 30–50 cm, monocarpic. Caudex simple. Stem solitary, slender, branched above, finely grooved, glabrous. Basal leaves many, petiole sheaths ovate, scarious-margined; blade ovate, 5–15 × 2–4 cm, 3-pinnate; pinnae 4–6 pairs, basally remote; ultimate segments ovate, 4–10 × 3–5 mm, deeply 3-toothed or pinnate. Cauline leaves reduced upwards, 3-lobed or pinnate, petioles wholly sheathing. Synflorescence much-branched, corymbose; umbels 3–6 cm across; peduncle apex and base of rays sparsely scaberulous; bracts absent; rays 5–7, 1–2.4 cm, unequal, thin; bracteoles 5–7, narrow-linear, 1–2 mm, shorter than flowers; umbellules 8–12-flowered; pedicels 0.7–4 mm. Calyx teeth obsolete or broadly triangular, small, ca. 0.2 mm. Petals yellowish, oblong, with an elongate narrowly inflexed apex, glabrous. Stylopodium low-conic; styles short. Fruit oblong, slightly dorsally compressed, ca. 2 × 1 mm, glabrous; ribs all filiform, slightly prominent; vittae 2–3 in each furrow, 4–6 on commissure. Fl. and fr. Aug–Oct.

Mountain slopes, grasslands, roadsides; ca. 900 m. S Gansu (Wenxian).

This rather poorly known species is recorded only from a few collections. See the taxonomic note under Seseli squarrulosum.

Two of us (Pimenov & Kljuykov, FOC 14: 129. 2005) treat Seseli squarrulosum as a synonym of this species.