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FOC | Family List | FOC Vol. 22 | Poaceae

45. Trikeraia Bor, Kew Bull. [9]. 1954: 555. 1955.

三角草属 san jiao cao shu

Perennial. Leaf blades usually rolled; ligule short, erose, ciliolate. Inflorescence an open or contracted panicle; pedicels short. Spikelets with 1 floret, bisexual, slightly dorsally compressed; rachilla extension absent; glumes subequal or slightly unequal, lanceolate or lanceolate-oblong, herbaceous, scabrid or smooth, 3–5-veined, apex acuminate; callus short, obtuse, bearded; lemma slightly shorter than glumes, lanceolate, covering only flanks of palea, membranous, 3–5-veined, villous, apex 2-lobed, lobes acuminate to setiform, awned from between lobes; awn persistent, scabrid, weakly 1-geniculate, column loosely twisted, sometimes only slightly so; palea hyaline, back exposed, pubescent between veins. Lodicules 2 or 3, lanceolate. Stamens 3, anthers glabrous at apex. Stigmas 2.

Four species: N Pakistan to Bhutan and W China, at high altitudes; three species (one endemic) in China.

1 Lemma with spreading pappuslike brush of hairs above middle, shortly pubescent below; awn 5–7 mm.   1 T. pappiformis
+ Lemma uniformly hairy; awn 8–15 mm   (2)
2 (1) Glumes 5-veined; awn arising below middle of lemma, lobes acuminate; anthers 1–1.5 mm.   2 T. oreophila
+ Glumes 3-veined; awn arising above middle of lemma, lobes setiform; anthers 4.5–5 mm.   3 T. hookeri

Lower Taxa


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