雀稗尾稃草Urochloa paspaloides J. S. Presl ex Presl
雀稗尾稃草Urochloa paspaloides J. S. Presl ex Presl
1. 雀稗尾稃草（禾本科图说）图版82：7-11
Urochloa paspaloides J. S. Presl ex Presl, Rel. Haenk. 1: 318. 1830; Ohwi in Acta Phytotax. et Geabot. 11: 33. 1942;中国主要植物图说 禾本科678. 图622. 1959;海南植物志4: 422. 1977.——Panicum ambiquum Trin. in Mem. Acad. Sci. St. Pctersb. ser 6, 3: 243. 1835; Merr. in Lingnan Sci. Journ. 5: 30. 1927: Merr. et Chun in Sunyatsenia 1: 50. 1930. ——Brachiaria paspaloides (Presl) Hubb. in Hook. Icon. Pl. t. 3363. 1938; Bor, Grass. Burm. Ceyl. Ind. Pakist. 284. 1960; H. B. Gill. et al. Fl. Malaya 3: 179. 1971;中国高等植物图鉴5: 165. 1975.
一年生草本。多分枝，高20-60厘米或更高；秆纤细，下部节上生根，节有时稍膨大而被髭毛。叶鞘松弛，短于节间，无毛或疏生疣基毛，边缘一侧被毛；叶舌退化为一圈长约1毫米的纤毛；叶片线状披针形，长5-10厘米，宽3-8毫米，两面被疣基毛。圆锥花序由2-4枚总状花序组成；总状花序长2-4厘米，彼此疏离排列于主轴上；主轴与穗轴均被柔毛；小穗长圆状披针形，长约4毫米，无毛，通常孪生；第一颖稍短于小穗，具5脉；第二颖与小穗等长，具5-7脉；第一外稃与小穗等长，具不明显5脉，其内稃通常缺或极小；第二外稃骨质，顶端具长约0.2毫米的小尖头，表面具微细横皱纹；鳞被2，膜质，有细脉。染色体2n=36（E. K. Janaki-Ammal，1954）。花果期5-10月。
产海南、云南；生于旷野山坡或疏林下。印度及马来群岛也有分布。模式标本采自菲律宾。
《Flora of China》 Vol. 22 (2006)
Urochloa paspaloides J. Presl
雀稗尾稃草 que bai wei fu cao
Brachiaria ambigua (Trinius) A. Camus; B. paspaloides (J. Presl) C. E. Hubbard; Panicum ambiguum Trinius; Urochloa ambigua (Trinius) Pilger.
Annual. Culms slender, spreading, branching and rooting at lower nodes, 20–60 cm or more tall, nodes pubescent. Leaf sheaths glabrous or loosely pilose; leaf blades linear, 5–20 × 0.3–0.8 cm, thinly pilose on both surfaces with tubercle-based hairs, apex acuminate; ligule ca. 1 mm. Inflorescence axis 1.5–4 cm; racemes 2–4, 2–5 cm, rather stiffly ascending; rachis narrow, triquetrous, scabrous; spikelets usually paired, loosely overlapping. Spikelets lanceolate, 3.5–4 mm, glabrous, sharply acute; lower glume lanceolate, 2/3–3/4 spikelet length, 5–7-veined, acute and apiculate; upper glume 5–7-veined, sharply acute; lower lemma obscurely 5-veined, palea very small; upper lemma elliptic-oblong, only slightly shorter than spikelet, finely rugulose, mucro 0.4–0.5 mm. Fl. and fr. May–Oct. 2n = 36.
Mountain slopes, forests. Hainan, Yunnan [India, Japan (Ryukyu Islands), Malaysia, Philippines, Sri Lanka].
This is the only species of Urochloa in China with a long lower glume.
科名：禾本科 Gramineae
属名：尾稃草属 Urochloa
1. 雀稗尾稃草（禾本科图说）图版82：7-11
Urochloa paspaloides J. S. Presl ex Presl, Rel. Haenk. 1: 318. 1830; Ohwi in Acta Phytotax. et Geabot. 11: 33. 1942;中国主要植物图说 禾本科678. 图622. 1959;海南植物志4: 422. 1977.——Panicum ambiquum Trin. in Mem. Acad. Sci. St. Pctersb. ser 6, 3: 243. 1835; Merr. in Lingnan Sci. Journ. 5: 30. 1927: Merr. et Chun in Sunyatsenia 1: 50. 1930. ——Brachiaria paspaloides (Presl) Hubb. in Hook. Icon. Pl. t. 3363. 1938; Bor, Grass. Burm. Ceyl. Ind. Pakist. 284. 1960; H. B. Gill. et al. Fl. Malaya 3: 179. 1971;中国高等植物图鉴5: 165. 1975.
一年生草本。多分枝，高20-60厘米或更高；秆纤细，下部节上生根，节有时稍膨大而被髭毛。叶鞘松弛，短于节间，无毛或疏生疣基毛，边缘一侧被毛；叶舌退化为一圈长约1毫米的纤毛；叶片线状披针形，长5-10厘米，宽3-8毫米，两面被疣基毛。圆锥花序由2-4枚总状花序组成；总状花序长2-4厘米，彼此疏离排列于主轴上；主轴与穗轴均被柔毛；小穗长圆状披针形，长约4毫米，无毛，通常孪生；第一颖稍短于小穗，具5脉；第二颖与小穗等长，具5-7脉；第一外稃与小穗等长，具不明显5脉，其内稃通常缺或极小；第二外稃骨质，顶端具长约0.2毫米的小尖头，表面具微细横皱纹；鳞被2，膜质，有细脉。染色体2n=36（E. K. Janaki-Ammal，1954）。花果期5-10月。
产海南、云南；生于旷野山坡或疏林下。印度及马来群岛也有分布。模式标本采自菲律宾。
《Flora of China》 Vol. 22 (2006)
Urochloa paspaloides J. Presl
雀稗尾稃草 que bai wei fu cao
Brachiaria ambigua (Trinius) A. Camus; B. paspaloides (J. Presl) C. E. Hubbard; Panicum ambiguum Trinius; Urochloa ambigua (Trinius) Pilger.
Annual. Culms slender, spreading, branching and rooting at lower nodes, 20–60 cm or more tall, nodes pubescent. Leaf sheaths glabrous or loosely pilose; leaf blades linear, 5–20 × 0.3–0.8 cm, thinly pilose on both surfaces with tubercle-based hairs, apex acuminate; ligule ca. 1 mm. Inflorescence axis 1.5–4 cm; racemes 2–4, 2–5 cm, rather stiffly ascending; rachis narrow, triquetrous, scabrous; spikelets usually paired, loosely overlapping. Spikelets lanceolate, 3.5–4 mm, glabrous, sharply acute; lower glume lanceolate, 2/3–3/4 spikelet length, 5–7-veined, acute and apiculate; upper glume 5–7-veined, sharply acute; lower lemma obscurely 5-veined, palea very small; upper lemma elliptic-oblong, only slightly shorter than spikelet, finely rugulose, mucro 0.4–0.5 mm. Fl. and fr. May–Oct. 2n = 36.
Mountain slopes, forests. Hainan, Yunnan [India, Japan (Ryukyu Islands), Malaysia, Philippines, Sri Lanka].
This is the only species of Urochloa in China with a long lower glume.