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Acronema yadongense/亚东丝瓣芹

General description: 

Plants 35–45 cm. Rhizome tuberous, ovoid-globose, 5–6 mm across. Stem thinly ribbed, little-branched. Lower stem leaves petiolate, petioles 5–13 cm, sheaths small; leaf blade broad-triangular, 5–6 × 4–5 cm, 2–3-pinnate; ultimate segments linear, 0.5–2.5 × 1–1.5 mm. Umbels 3–5 cm across; peduncles 1.2–3 cm; bracts absent; rays 9–12, 1.5–3 cm, scabrous distally; bracteoles absent or 1–2, linear, small; umbellules ca. 5 mm across, 8–17-flowered; pedicels 2–3 mm, unequal, slender. Ca-lyx teeth obsolete. Petals white, obovate or elliptic, 1–1.2 × ca. 1 mm; apex acute. Stylopodiumi purple-black. Young fruit, ob-long-elliptic ca. 1.8 × 1.2 mm (mature fruit unknown). Fl. Sep.


Diagnostic description: 

This incompletely known taxon is recorded only from a few col-lections.

Species A. johriano Babu affinis, sed laminis saepe bi-tripinnatisectis, radiis 9-12, phyllis invol1ucelli 1-2 vel nuIlis, plantis altis differt.

Distribution: 

S Xizang (Yadong).

Habitat: 

Forests, grassy slopes; ca. 3700 m.

周日, 2014-08-31 14:02 -- 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