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POACEAE Tribe BROMEAE
Annual or perennial herbs. Leaf-blades narrow, flat; ligule membranous. Inflorescence a loose or contracted panicle. Spikelets all alike, laterally compressed or subterete, several- to many-flowered, the uppermost florets reduced; rhachilla disarticulating below each floret; glumes persistent, shorter than the lowest lemma, often scarious on the margins; lemmas herbaceous, 5-9-nerved, ± 2-toothed with a straight or recurved awn from just below the hyaline tip, rarely with 3 or 9 awns; palea hyaline, usually shorter than the lemma; lodicules 2; stamens 3 or 2; styles 2, inserted laterally below a hairy appendage crowning the ovary. Grain with small embryo and linear hilum; starch grains simple, rounded. Chromosomes large, basic number 7.
Genera 2; temperate regions, mainly in the northern hemisphere; both genera and 18 species in Pakistan.
A tribe resembling Poeae, but with a curious hairy appendage on the ovary, and with the peculiar rounded starch grains typical of Triticeae. In many respects it is intermediate between these two tribes.
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Lemmas rounded or keeled, without ridged nerves; awns at most 3, usually only 1 |
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Bromus |
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Lemmas rounded on the back, with 9 prominently ridged nerves which pass out into recurved awns |
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Boissiera |
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Lower Taxa
Related Synonym(s):
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Treatments in Other Floras @ www.efloras.org
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