中国伞形科植物在线

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Acronema graminifolium/禾叶丝瓣芹

General description: 

Plants 20–80 cm. Rhizome tuberous, globose, 6–8 mm thick. Stem purplish, hollow, thinly ribbed. Lower stem leaves petiolate, petioles 5–11 cm, sheaths short; blade 3–9 × 5–10 cm, 2–3-pinnate; ultimate segments linear, 2.5–7 × 2–4 mm, entire, scabrous along nerves adaxially. Umbels 3–8 cm across; bracts and bracteoles usually absent; rays 3–7, 4–35 mm, unequal; umbellules 8–15 mm across, 4–9-flowered; pedicels 0.5–1.3 cm, slender, unequal. Calyx teeth obsolete. Petals white or mar-gin purplish, ovate, 5–5.5 × ca. 0.7 mm; apex long-linear, ca. 4 mm. Young fruit broad-ovoid, ca. 2 × 1 mm (mature fruit poor-ly known). Fl. Jun–Aug.

Diagnostic description: 

This is a rather poorly known taxon. In Bhutan this plant grows in mixed populations with Acronema hookeri and is sometimes treated as a variety of that species. Further collections are needed to resolve the taxonomy.

Distribution: 

W Sichuan, S Xizang [Bhutan, Sikkim].

Habitat: 

Forests, mountain slopes; 2600–4000 m.

周日, 2014-08-31 11:32 -- 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