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网檐南星Arisaema utile

时间:2013-07-16 12:29来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):网檐南星 学名( Scientific Name ): Arisaema utile Hook.f. ex Engl. 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Arisaema verrucosum var. utile (Hook.f. ex Engl.) Pradhan




中文名(Chinese Name):网檐南星
学名(Scientific Name):Arisaema utile Hook.f. ex Engl.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Arisaema verrucosum var. utile (Hook.f. ex Engl.) Pradhan;Arisaema utile var. meeboldii Engl.
科属(Family & Genus):天南星科(Araceae)天南星属
形态特征(Description):块茎扁球形,直径3-5厘米,常具小球茎。鳞叶狭,锐尖,内面的长9厘米。叶1-2,叶柄长20-40厘米,具黑色斑块,下部1/3鞘状。叶片3全裂,裂片无柄或近无柄,绿色,边缘红色,脉凸起,常在背面呈红色,中裂片扁菱形或卵状菱形,渐尖,有时宽胜于长,长7-15(-20)厘米,宽5-11(-20)厘米;侧裂片偏斜,渐尖,内侧基部楔形,外侧圆形,长10-13厘米,宽5-10厘米。花序柄短于叶柄,长18-23厘米。佛焰苞管部圆柱形,紫褐色具白条纹,长5-10厘米,宽1.5-2.7厘米;檐部倒卵形,盔状下弯,长5-13厘米,宽3-11厘米,先端圆形或具突尖,有时骤狭渐尖,暗紫褐色,背面有清晰的白色纵脉,近边缘有白色网脉。肉穗花序单性,雄花序长1.5-2.5厘米,花疏,雄花具长柄,花药3-5,马蹄形开裂;雌花序圆锥形,长2.5-6厘米,子房倒卵圆形,绿色,花柱极短,暗紫色。附属器鞭状,褐色,散布紫色小斑点,长7-20厘米,远伸出于佛焰苞外,具5-8毫米长的柄,基部突然增粗至5-15毫米,基底截形,向上渐狭,在管内直立,于喉部水平外伸,然后之字形上升或下垂。浆果卵圆形,幼时有白色条纹。花期5-6月。
分布(Distribution):产云南西北部、西部及西藏南部,生于海拔2300-4000米的灌丛、杉树林下、杜鹃林以及高山草地等。东南亚也有分布。
用途(Use):
引自中国植物志英文版FOC Vol. 23 Page 51, 52
Arisaema utile J. D. Hooker ex Schott, Prodr. Syst. Aroid. 30. 1860.
网檐南星 wang yan nan xing | Araceae  | Arisaema
Plants dioecious. Tuber depressed globose, 3-10 cm in diam., with small tubercles. Cataphylls to 9 cm, membranous. Leaf solitary; petiole green with dark purple spots, 20-40 cm, proximal 1/3 sheathing into pseudostem; leaf blade 3-foliolate; leaflets sessile or subsessile, green with reddish margin; veins raised, often reddish abaxially; central leaflet broadly rhombic or ovate-rhombic, sometimes broader than long, 7-15 × 6-11 cm, base broadly cuneate, apex acuminate; lateral leaflets obliquely ovate, 11-14 × 7-9 cm, base rounded to subtruncate, apex acuminate. Peduncle shorter than petioles, 20-22 cm. Spathe tube purplish brown with longitudinal whitish lines, cylindric, 4-5 × 1.5-2 cm, longitudinally lamellate inside, throat margins slightly recurved; limb strongly incurved, dark purple with white longitudinal and reticulate lines (at margin), obovate, 7-8 × 3-5 cm, apex acuminate. Spadix unisexual; female zone conic, 2.6-6 cm; ovary green, obovoid; stigma subsessile, dark purple; male zone 1.5-2 cm × ca. 4 mm; synandria of 2-5 stamens; connected filaments distinct, 0.5-1 mm; anther dehiscing by horseshoe-shaped slit. Appendix brown, flagelliform, 11-20 cm, thickened toward base 5-15 mm wide, base truncate and stipitate. Fl. May.
Tsuga forest margins, thickets; 2800-3100 m. Xizang, Yunnan [Bhutan, N India, Kashmir, Myanmar, Nepal, Pakistan].
(责任编辑:徐晔春)
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