中国伞形科植物在线

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Acronema chinense/尖瓣芹

General description: 

Plants 5–75 cm. Root tuberous, globose, 3–4 mm across. Stem slender, thinly ribbed. Basal leaves petiolate, petioles 2–5 cm, sheaths short; blade broad-triangular, 2–5 × 3–6 cm, 2-ter-nate-pinnate; pinnae petiolules ca. 7 mm; ultimate segments cu-neate-obovate, ca. 4 × 3 mm, subsessile, apex 3-toothed. Stem leaves long-petiolate, petioles 1–4 cm; ultimate segments rhom-bic-ovate, ca. 2 × 1 mm, apex incised-serrate. Umbels 2–5 cm across; peduncles 0.5–13 cm; bracts absent or 1, linear; rays 3–7, 2–5 cm, distinctly unequal; bracteoles absent; umbellules 7–10 mm across, 3–8-flowered; pedicels 2–10 mm, distinctly un-equal. Calyx teeth obsolete. Petals white, ovate, ca. 1 × 0.5 mm; apex acute. Fruit oblong, ca. 2 × 1.2 mm, apex slightly sep-arated; ribs filiform; vittae 1 in each furrow, 2 on commissure. Fl. Jul, fr. Aug–Sep.

Distribution: 

 Gansu, Qinghai, Sichuan, Xizang.

Habitat: 

Shrubby thickets, ravines, damp crevices on rocky slopes; 3200–4900 m.

周日, 2014-08-31 14:41 -- admin
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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith