织梦CMS - 轻松建站从此开始!

花卉图片网

当前位置: 主页 > 草本花卉 >

两耳草Paspalum conjugatum

时间:2013-09-11 13:46来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):两耳草 学名( Scientific Name ): Paspalum conjugatum C.Cordem. 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Paspalum dolichopus Trin. ex Steud. Paspalum renggeri Steud. P
中文名(Chinese Name):两耳草
学名(Scientific Name):Paspalum conjugatum C.Cordem.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Paspalum dolichopus Trin. ex Steud.  Paspalum renggeri Steud.  Paspalum sieberianum Steud.  Digitaria conjugata (P.J.Bergius) Schult.  Paspalum africanum Poir.  Panicum conjugatum (P.J.Bergius) Roxb.  Paspalum conjugatum var. parviflorum Döll  Paspalum conjugatum var. tristachyum Vanderyst  Paspalum conjugatum var. pubescens Döll  Paspalum conjugatum f. tristachyum Beetle  Paspalum bicrurum Salzm. ex Döll  Paspalum conjugatum var. conjugatum   Paspalum conjugatum var. tristachya Vanderz
科属(Family & Genus):禾本科(Gramineae)雀稗属Paspalum
形态特征(Description):多年生。植株具长达1米的匍匐茎,秆直立部分高30-60厘米。叶鞘具脊,无毛或上部边缘及鞘口具柔毛;叶舌极短,与叶片交接处具长约1毫米的一圈纤毛;叶片披针状线形,长5-20厘米,宽5-10毫米,质薄,无毛或边缘具疣柔毛。总状花序2枚,纤细,长6-12厘米,开展;穗轴宽约0.8毫米,边缘有锯齿;小穗柄长约0.5毫米;小穗卵形,长1.5-1.8毫米,宽约1.2毫米,顶端稍尖,复瓦状排列成两行;第二颖与第一外稃质地较薄,无脉,第二颖边缘具长丝状柔毛,毛长与小穗近等。第二外稃变硬,背面略隆起,卵形,包卷同质的内稃。颖果长约1.2毫米,胚长为颖果的1/3。染色体2n=40(Sarkar et al., 1976),80(Gould et Soderstrom,1974)。花果期5-9月。
分布(Distribution):产台湾、云南、海南、广西;生于田野、林缘、潮湿草地上。全世界热带及温暖地区有分布。
用途(Use):牧草。
引自中国植物志英文版FOC Vol. 22 Page 526
Paspalum conjugatum Bergius, Acta Helv. Phys.-Math. 7: 129. 1772.
两耳草 liang er cao  | Poaceae  | Paspalum
Perennial with long stolons. Culms in small tufts along the stolons, compressed, nearly solid, 30–60 cm tall. Leaf sheaths keeled, glabrous or pilose along upper margins and mouth, a line of hairs abaxially at junction with blade; leaf blades lanceolate-linear, thin, 5–20 × 0.5–1 cm, glabrous or papillose-pilose along margins, apex acute. Inflorescence digitate; racemes 2, divaricate, very slender, 6–12 cm; spikelets single, in 2 rows; rachis 0.5–1 mm wide. Spikelets pale yellowish, ovate to suborbicular, 1.5–1.8 mm, abruptly acute; upper glume hyaline, 2-veined with the veins marginal, ciliate along margins with long silky hairs; lower lemma similar but not ciliate; upper lemma pallid at maturity, ovate, as long as spikelet, crustaceous, obscurely striate. Fl. and fr. May–Sep. 2n = 40, 80.
Open places in forests, forest margins, mostly on moist soils, sometimes forming a sward. Fujian, Guangxi, Hainan, Hong Kong, Taiwan, Yunnan [tropics and subtropics throughout the world].
This is a distinctive species, easily recognized by the combination of a stoloniferous habit and an inflorescence composed of a pair of widely spreading racemes with small, pale, fringed spikelets.



 
(责任编辑:徐晔春)
顶一下
(0)
0%
踩一下
(1)
100%
------分隔线----------------------------
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
用户名: 验证码:点击我更换图片