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大苞水竹叶Murdannia bracteata

时间:2013-11-11 15:44来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 大苞水竹叶 学名( Scientific Name ): Murdannia bracteata (C.B.Clarke) J.K.Morton ex D.Y.Hong 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Aneilema bracteatum (C. B. Clar
中文名(Chinese Name):大苞水竹叶
学名(Scientific Name):Murdannia bracteata (C.B.Clarke) J.K.Morton ex D.Y.Hong
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Aneilema bracteatum (C. B. Clarke) Kuntze  Aneilema kuntzei C. B. Clarke  Aneilema nudiflorum var. bracteatum C. B. Clarke
科属(Family & Genus):鸭跖草科Commelinaceae水竹叶属Murdannia
形态特征(Description):多年生草本(有的标本上可见到横走根状茎)。根须状而极多,直径0.5-1毫米,相当密地被长绒毛。主茎不育,极短,可育茎通常2支,由主茎下部叶丛中发出,长而匍匐,顶端上升,节上生根,长20-60厘米,全面被细柔毛或仅一侧被毛,节间长达10厘米。叶在主茎上的密集成莲座状,剑形,长20-30厘米,宽1.2-1.8厘米,下部边缘有细长睫毛,上面无毛,下面有短毛或无毛;可育茎上的叶卵状披针形至披针形,长3-12厘米,宽1-1.5厘米,两面无毛或背面有糙毛,叶鞘全面被细长柔毛或仅沿口部一侧有刚毛。蝎尾状聚伞花序通常2-3个,少单个;总苞片叶状,但较小;聚伞花序因花极为密集而呈头状,具2-3厘米长的总梗;苞片圆形,长5-7毫米,早落;花梗极短,果期伸长,长2-3毫米,强烈弯曲;萼片草质,卵状椭圆形,浅舟状,长约4毫米;花瓣蓝色。蒴果宽椭圆状三棱形,长4毫米。种子黄棕色,具由胚盖发出的辐射条纹,并有白色细网纹,无孔。花果期5-11月。
分布(Distribution):产广东、海南、广西和云南南部。生于山谷水边或溪边沙地上。广州华南植物园曾有栽培。中南半岛也有分布。
用途(Use):
引自中国植物志英文版:FOC Vol. 24 Page 30
Murdannia bracteata (C. B. Clarke) J. K. Morton ex D. Y. Hong, Acta Phytotax. Sin. 12: 473. 1974.
大苞水竹叶 da bao shui zhu ye| Commelinaceae  | Murdannia
Aneilema nudiflorum (Linnaeus) R. Brown var. bracteatum C. B. Clarke in A. de Candolle & C. de Candolle, Monogr. Phan. 3: 211. 1881; A. bracteatum (C. B. Clarke) Kuntze; A. kuntzei C. B. Clarke.
Herbs perennial. Roots fibrous, 0.5--1 mm in diam., rather densely tomentose. Rhizomes horizontal. Main stem undeveloped, very short; fertile stems usually 2, arising from rosette, long, creeping, ascending apically, 20--60 cm; internodes ca. 10 cm, pubescent throughout or only on 1 side. Basal leaves rosulate; leaf blade linear, 20--30 × 1.2--1.8 cm, glabrous on both surfaces or abaxially puberulent, margin ciliate proximally. Cauline leaves with sheath pubescent throughout or only hispid-ciliate at mouth; leaf blade ovate-lanceolate or lanceolate, 3--12 × 1--1.5 cm, glabrous on both surfaces or abaxially scabrid. Cincinni (1--)3--5, densely flowered, capitate; peduncle 2--3 cm; involucral bracts leaflike but smaller than leaves; bracts orbicular, 5--7 mm, caducous; pedicels very short, strongly curved, elongate to 2--3 mm in fruit. Sepals ovate-elliptic, ca. 4 mm. Petals blue, obovate-orbicular. Fertile stamens 2; filaments pubescent; staminodes 3; antherodes 3-sect. Capsule broadly ellipsoid, trigonous, ca. 4 mm, Seeds 2 per valve, yellow-brown, radiate striate, white reticulate, not pitted. Fl. May--Nov.
By water, sandy places in ravines. Guangdong, Guangxi, Hainan, S Yunnan (Lüchun Xian, Xishuangbanna Dai Zu Zizhizhou) [Laos, Thailand, Vietnam].
 


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