Annual or perennial, often shortly rhizomatous. Leaf blades linear, flat. Inflorescence a spikelike, cylindrical panicle, elongate to ovoid or capitate; branches short, sometimes adnate to axis, spikelets densely crowded, subsessile. Spikelets strongly laterally compressed, floret 1, disarticulating above glumes; rachilla extension present or absent; glumes equal, oblong or obovate in side view, longer than and enclosing floret, herbaceous, 3-veined, strongly keeled, keel often pectinate-ciliate, margins overlapping but not connate, apex truncate to acute, with stout mucro or short stiff awn; lemma broadly oblong or ovate, thinly membranous, dorsally convex, 3–7-veined, apex truncate to subacute, awnless or mucronate; palea slightly shorter than lemma, ciliate along keels; lodicules 2; stamens 3. Caryopsis ellipsoid to ovoid. 50. Phleum L. Por G. Davidse. Anuales o perennes, cespitosas, estoloníferas o rizomatosas. Tallos erectos a geniculados. Lígula una membrana; láminas lineares, aplanadas. Inflorescencia una panícula densa, espiciforme o cilíndrica a capitada. Espiguillas comprimidas lateralmente, con 1 flósculo bisexual; desarticulación por debajo de las glumas, la espiguilla caediza como una unidad; glumas más largas que el flósculo, iguales o subiguales, 3-nervias, membranáceas, fuertemente carinadas, las quillas a menudo ciliadas, agudas a aristadas; lema membranácea, truncada, (1-)3-5(-7)-nervia, generalmente sin arista, raramente mucronata; pálea casi tan larga como la lema, angosta, 2-carinada, obtusa; raquilla prolongada o no prolongada por la base del flósculo; lodículas 2; estambres (2)3; estilos y estigmas 2. Fruto una cariopsis; hilo punteado; endospermo sólido. 15 spp. Ártico a hemisferio norte templado y Sudamérica antártica a templada. La única especie en Mesoamérica es Phleum alpinum , y está representada por la variedad típica, subsp. alpinum . Bibliografía: Humphries, C.J. J. Linn. Soc., Bot. 76: 337-340 (1978). Spikelets 1-fld, strongly flattened, articulated above the glumes; glumes equal, compressed and keeled, stoutly 3-veined, truncate or rounded to acuminate, with thin or scarious margins; lemma much shorter than the glumes, thin and delicate, broad, 3–5-veined, obtuse or truncate, awnless; palea narrow, to nearly as long as the lemma; mostly tufted grasses with membranous, often elongate ligule, flat lvs, and very dense, cylindric to ellipsoid, spike- like panicles; our spp. perennials with awned glumes. 10, temp. and cool regions. 50. Phleum L. Por G. Davidse. Anuales o perennes, cespitosas, estoloníferas o rizomatosas. Tallos erectos a geniculados. Lígula una membrana; láminas lineares, aplanadas. Inflorescencia una panícula densa, espiciforme o cilíndrica a capitada. Espiguillas comprimidas lateralmente, con 1 flósculo bisexual; desarticulación por debajo de las glumas, la espiguilla caediza como una unidad; glumas más largas que el flósculo, iguales o subiguales, 3-nervias, membranáceas, fuertemente carinadas, las quillas a menudo ciliadas, agudas a aristadas; lema membranácea, truncada, (1-)3-5(-7)-nervia, generalmente sin arista, raramente mucronata; pálea casi tan larga como la lema, angosta, 2-carinada, obtusa; raquilla prolongada o no prolongada por la base del flósculo; lodículas 2; estambres (2)3; estilos y estigmas 2. Fruto una cariopsis; hilo punteado; endospermo sólido. 15 spp. Ártico a hemisferio norte templado y Sudamérica antártica a templada. La única especie en Mesoamérica es Phleum alpinum , y está representada por la variedad típica, subsp. alpinum . Bibliografía: Humphries, C.J. J. Linn. Soc., Bot. 76: 337-340 (1978). Annual or perennial, often shortly rhizomatous. Leaf blades linear, flat. Inflorescence a spikelike, cylindrical panicle, elongate to ovoid or capitate; branches short, sometimes adnate to axis, spikelets densely crowded, subsessile. Spikelets strongly laterally compressed, floret 1, disarticulating above glumes; rachilla extension present or absent; glumes equal, oblong or obovate in side view, longer than and enclosing floret, herbaceous, 3-veined, strongly keeled, keel often pectinate-ciliate, margins overlapping but not connate, apex truncate to acute, with stout mucro or short stiff awn; lemma broadly oblong or ovate, thinly membranous, dorsally convex, 3–7-veined, apex truncate to subacute, awnless or mucronate; palea slightly shorter than lemma, ciliate along keels; lodicules 2; stamens 3. Caryopsis ellipsoid to ovoid. Spikelets 1-fld, strongly flattened, articulated above the glumes; glumes equal, compressed and keeled, stoutly 3-veined, truncate or rounded to acuminate, with thin or scarious margins; lemma much shorter than the glumes, thin and delicate, broad, 3–5-veined, obtuse or truncate, awnless; palea narrow, to nearly as long as the lemma; mostly tufted grasses with membranous, often elongate ligule, flat lvs, and very dense, cylindric to ellipsoid, spike- like panicles; our spp. perennials with awned glumes. 10, temp. and cool regions.General Information
Source: [
Source: [
Flora Mesoamericana
General InformationFlora of China @ efloras.org
General InformationManual of Vascular Plants of Northeastern US and Canada
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