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弯叶画眉草Eragrostis curvula

时间:2013-09-11 13:43来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):弯叶画眉草 学名( Scientific Name ): Eragrostis curvula (Schrad.) Nees 英文名( English Common Name ): weeping lovegrass 别名( Chinese Common Name ): 异名( Synonym ): Poa curvula Schrad. Eragrostis chlor
中文名(Chinese Name):弯叶画眉草
学名(Scientific Name): Eragrostis curvula (Schrad.) Nees
英文名(English Common Name): weeping lovegrass
别名(Chinese Common Name):
异名(Synonym):Poa curvula Schrad.  Eragrostis chloromelas Steud.  Eragrostis curvula var. decolorans Rendle  Eragrostis procerior Rendle  Eragrostis huillensis Rendle  Eragrostis thunbergiana Steud.  Eragrostis robusta Stent  Eragrostis capillifolia Nees  Eragrostis subulata Nees  Eragrostis jeffreysii Hack.  Eragrostis pubiculmis Jedwabn.  Eragrostis curvula var. valida Stapf  Eragrostis lehmanniana var. ampla Stapf  Poa capensis Steud.  Eragrostis poa Stapf  Eragrostis thunbergiana var. atrata Schweinf.  Eragrostis curvula var. atrata (Schweinf.) Cufod.
科属(Family & Genus):禾本科(Gramineae)画眉草属
形态特征(Description):多年生。秆密丛生,直立,高90-120厘米,基部稍压扁,一般具有5-6节,叶鞘基部相互跨覆,长于节间数倍,而上部叶鞘又比节间短。下部叶鞘粗糙并疏生刺毛,鞘口具长柔毛;叶片细长丝状,向外弯曲,长10-40厘米,宽1-2.5毫米。圆锥花序开展,长15-35厘米,宽6-9厘米,花序主轴及分枝单生、对生或轮生,平展或斜上升,二次分枝和小,穗柄贴生紧密,小穗柄极短,分枝腋间有毛,小穗长6-11毫米,宽1.5-2毫米,有5-12小花,排列较疏松,铅绿色;颖披针形,先端渐尖,均具1脉,第一颖长约1.5毫米,第二颖长约2.5毫米;第一外稃长约2.5毫米,广长圆形,先端尖或钝,具3脉;内稃与外稃近等长,长约2.3毫米,具2脊,无毛,先端圆钝,宿存或缓落;雄蕊3枚,花药长约1.2毫米。染色体数目变异较大,通常2n=20-80,亦间有2n=42或63。花果期4-9月。
分布(Distribution):原产非洲。我国南方有栽培。
用途(Use):
引自中国植物志英文版FOC Vol. 22 Page 472, 474
Eragrostis curvula (Schrader) Nees, Fl. Afr. Austral. Ill. 397. 1841.
弯叶画眉草 wan ye hua mei cao | Poaceae  | Eragrostis
Poa curvula Schrader, Gött. Gel. Anz. 3: 2073. 1821.
Perennial. Culms densely tufted, erect, 80–120 cm tall, 5–6-noded. Leaf sheaths scabrous with retrorse hairs at lower part, glabrous upward, shorter than internodes, long pilose along the summit; leaf blades elongate, involute, attenuate to a fine point, arcuate spreading, scabrous, (5–)10–40 cm × 1–2.5(–3) mm. Panicles open, 12–35 × 6–9 cm; branches solitary or in pairs, ascending, naked at base, at least the lower densely pilose in axils. Spikelets gray-green, (4–)6–11 × 1.5–2 mm, 5–16-flowered. Glumes lanceolate, apex acuminate, 1-veined, lower glume 1.2–1.5 mm, upper glume 1.8–2.5 mm. Lemmas broadly oblong, apex acute or obtuse, veins prominent, lower lemma 2–2.5 mm. Palea subequal to lemma, 2-keeled, persistent or tardily deciduous. Stamens 3; anthers ca. 1.2 mm. Caryopsis ellipsoid to obovoid, dorsally compressed, adaxial surface with a shallow, broad groove or ungrooved, smooth, mostly translucent, light brown, 1–1.7 mm. Fl. and fr. Apr–Sep. 2n = 20, 42, 63, 80.
Commonly cultivated for ornament. Fujian, Guangxi, Hubei, Jiangsu, Xinjiang, Yunnan [native to Africa].
This species is used for fodder and as an ornamental grass.
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