垂穗草Bouteloua curtipendula (Michx.) Torr.
垂穗草Bouteloua curtipendula (Michx.) Torr.
1．垂穗草（禾本科检索表）图版21：1-3
Bouteloua curtipendula (Michx.) Torr. in Emory, Not. Mil. Reconn. 154. 1848; Hitchc. Man. Grass. Unit. Stat. 535. f. 774. 1950;中国主要植物图说 禾本科463. 图369. 1959; Bor, Grass. Burm. Ceyl. Ind. Pakist. 463. 1960. ——Chloris curtipendula Michx. Fl. Bor. Am. 1: 59. 1803.
多年生直立草本。根茎短，密被鳞片。秆丛生，高30-100厘米。叶鞘无毛或疏生短毛；叶舌质厚，长约1毫米，具短纤毛；叶片扁平或稍卷折，长20-30厘米，宽1-5毫米，两面粗糙，基部有细柔毛，边缘具疣毛。穗状花序10-50枚，长8-18毫米，带紫色，具长2-3毫米的柄，常下垂而偏生于主轴之一侧；小穗长4.5-5.5毫米；颖尖披针形，具1脉；第一颖长2.5-4毫米，第二颖长约4毫米；第一外稃略长于颖，先端2浅裂，边脉可延伸成长约1毫米的小尖头；内稃略长于外稃；雄蕊3枚，花药长约2毫米，不孕外稃通常不明显。染色体2n=28，35，40，42，56，70（Fults，1942）。
原产美洲，我国在同纬度地带有引种，试验栽培作为牧草。
《Flora of China》 Vol. 22 (2006)
Bouteloua curtipendula (Michaux) Torrey
垂穗草 chui sui cao
Chloris curtipendula Michaux, Fl. Bor.-Amer. 1: 59. 1803; Atheropogon curtipendulus (Michaux) E. Fournier; Cynodon curtipendulus (Michaux) Raspail; Dinebra curtipendula (Michaux) P. Beauvois; Eutriana curtipendula (Michaux) Trinius.
Perennial with short, slender, scaly rhizomes. Culms tufted, erect, 30–100 cm tall. Leaf sheaths glabrous or nearly so; leaf blades flat or slightly involute, 20–30 cm, 1–5 mm wide, both surfaces and margins scabrous, base pubescent; ligule ca. 1 mm. Inflorescence axis 15–25 cm; racemes 10–50, 1–2 cm, purplish, secund along axis, usually nodding, with 3–6 (–10) appressed or ascending spikelets, falling entire. Spikelets 4.5–10 mm; lower glume linear-lanceolate, 2.5–4 mm; upper glume lanceolate, 4(–7) mm; lemma of fertile floret usually somewhat exceeding glumes, acuminate, lateral veins extended into ca. 1 mm mucros; palea slightly longer than lemma; 2nd floret rudimentary, with long central awn and 2 shorter laterals, or greatly reduced, or lacking. Fl. and fr. summer to autumn. 2n = 28, 35, 40, 42, 56, 70.
Cultivated in China [native to America].
This is an American pasture grass (Side-oats Grama) reported to be excellent in China for grazing and also for hay.
别名：sideoats grama;
科名：禾本科 Gramineae
属名：格兰马草属 Bouteloua
1．垂穗草（禾本科检索表）图版21：1-3
Bouteloua curtipendula (Michx.) Torr. in Emory, Not. Mil. Reconn. 154. 1848; Hitchc. Man. Grass. Unit. Stat. 535. f. 774. 1950;中国主要植物图说 禾本科463. 图369. 1959; Bor, Grass. Burm. Ceyl. Ind. Pakist. 463. 1960. ——Chloris curtipendula Michx. Fl. Bor. Am. 1: 59. 1803.
多年生直立草本。根茎短，密被鳞片。秆丛生，高30-100厘米。叶鞘无毛或疏生短毛；叶舌质厚，长约1毫米，具短纤毛；叶片扁平或稍卷折，长20-30厘米，宽1-5毫米，两面粗糙，基部有细柔毛，边缘具疣毛。穗状花序10-50枚，长8-18毫米，带紫色，具长2-3毫米的柄，常下垂而偏生于主轴之一侧；小穗长4.5-5.5毫米；颖尖披针形，具1脉；第一颖长2.5-4毫米，第二颖长约4毫米；第一外稃略长于颖，先端2浅裂，边脉可延伸成长约1毫米的小尖头；内稃略长于外稃；雄蕊3枚，花药长约2毫米，不孕外稃通常不明显。染色体2n=28，35，40，42，56，70（Fults，1942）。
原产美洲，我国在同纬度地带有引种，试验栽培作为牧草。
《Flora of China》 Vol. 22 (2006)
Bouteloua curtipendula (Michaux) Torrey
垂穗草 chui sui cao
Chloris curtipendula Michaux, Fl. Bor.-Amer. 1: 59. 1803; Atheropogon curtipendulus (Michaux) E. Fournier; Cynodon curtipendulus (Michaux) Raspail; Dinebra curtipendula (Michaux) P. Beauvois; Eutriana curtipendula (Michaux) Trinius.
Perennial with short, slender, scaly rhizomes. Culms tufted, erect, 30–100 cm tall. Leaf sheaths glabrous or nearly so; leaf blades flat or slightly involute, 20–30 cm, 1–5 mm wide, both surfaces and margins scabrous, base pubescent; ligule ca. 1 mm. Inflorescence axis 15–25 cm; racemes 10–50, 1–2 cm, purplish, secund along axis, usually nodding, with 3–6 (–10) appressed or ascending spikelets, falling entire. Spikelets 4.5–10 mm; lower glume linear-lanceolate, 2.5–4 mm; upper glume lanceolate, 4(–7) mm; lemma of fertile floret usually somewhat exceeding glumes, acuminate, lateral veins extended into ca. 1 mm mucros; palea slightly longer than lemma; 2nd floret rudimentary, with long central awn and 2 shorter laterals, or greatly reduced, or lacking. Fl. and fr. summer to autumn. 2n = 28, 35, 40, 42, 56, 70.
Cultivated in China [native to America].
This is an American pasture grass (Side-oats Grama) reported to be excellent in China for grazing and also for hay.