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FOC | Family List | FOC Vol. 22 | Poaceae

80. Deschampsia P. Beauvois, Ess. Agrostogr. 91. 1812.

发草属 fa cao shu

Authors: Zhen-lan Wu & Sylvia M. Phillips

Avenella (Bluff & Fingeruth) Drejer; Aira sect. Avenella Bluff & Fingerhuth.

Perennials, densely tufted. Leaf blades mainly basal, linear to setaceous, flat, folded or rolled; ligule membranous. Inflorescence usually an open panicle, infrequently contracted or spikelike; branches and pedicels usually filiform. Spikelets oblong to gaping, shining, laterally compressed, florets 2–3(–5), disarticulating below each floret; rachilla pilose, extended beyond uppermost floret; glumes lanceolate to oblong, subequal, ± equaling spikelet, membranous, shining, keeled, lower glume 1-veined, upper glume 1–3-veined; floret callus small, pubescent to conspicuously bearded; lemmas lanceolate to oblong, hyaline to shiny cartilaginous, back rounded, finely 4-veined (5th midvein extended into awn), glabrous, awned from near base or in lower half, apex membranous, broad, 4-toothed or denticulately truncate; awn straight or weakly geniculate, usually not exserted from spikelet; palea hyaline, subequal to lemma. Ovary glabrous. Caryopsis with solid endosperm.

About 40 species: temperate and cold regions of the world; three species in China.

1 Awns geniculate, clearly exserted from spikelet; leaf blades setaceous, smooth.   1 D. flexuosa
+ Awns straight or almost so, included in spikelet or only shortly exserted; leaf blades linear, usually adaxially scabrid   (2)
2 (1) Panicle dense, spikelike, 1–7 cm, ovate to oblong, brownish purple with golden sheen.   2 D. koelerioides
+ Panicle lax and open, or contracted but not spikelike, 6–30 cm, narrowly oblong to ovate.   3 D. cespitosa

Lower Taxa


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