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东风草Blumea megacephala

时间:2013-07-23 14:10来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):东风草 学名( Scientific Name ): Blumea megacephala (Randeria) C.T.Chang C.H.Yu ex Y.Ling 英文名( English Common Name ): 别名( Chinese Common Name ): 大头艾纳香 异名( Synonym ): Blumea riparia var. mega



中文名(Chinese Name):东风草
学名(Scientific Name): Blumea megacephala (Randeria) C.T.Chang & C.H.Yu ex Y.Ling
英文名(English Common Name):
别名(Chinese Common Name):大头艾纳香
异名(Synonym):Blumea riparia var. megacephala Randeria
科属(Family & Genus):菊科(Compositae)艾纳香属
形态特征(Description):攀援状草质藤本或基部木质。茎圆柱形,多分枝,长1-3米或更长,基部径5-10毫米,有明显的沟纹,被疏毛或后脱毛,节间长6-12厘米,小枝节间长2-4厘米。下部和中部叶有长达2-5毫米的柄,叶片卵形、卵状长圆形或长椭圆形,长7-10厘米,宽2.5-4厘米,基部圆形,顶端短尖,边缘有疏细齿或点状齿,上面被疏毛或后脱毛,有光泽,干时常变淡黑色,下面无毛或多少被疏毛,中脉在上面明显,在下面凸起,侧脉5-7对,弧形上升,网状脉极明显;小枝上部的叶较小,椭圆形或卵状长圆形,长2-5厘米,宽1-1.5厘米,具短柄,边缘有细齿。头状花序疏散,径1.5-2厘米,通常1-7个在腋生小枝顶端排列成总状或近伞房状花序,再排成大型具叶的圆锥花序;花序柄长1-3厘米;总苞半球形,与花盘几等长,长约1厘米;总苞片5-6层,外层厚质,卵形,顶端钝或有时具短尖头,基部常弯曲,长3-5毫米,背面被密毛,中层质稍薄,带干膜质,线状长圆形,顶端稍尖,长8-10毫米,背面脊处被毛,有缘毛,内层长于最外层的三倍;花托平,径8-11毫米,被白色密长柔毛。花黄色,雌花多数,细管状,长约8毫米,檐部2-4齿裂,裂片顶端浑圆,被短柔毛;两性花花冠管状,连伸出花冠的花药长约1厘米,被白色多细胞节毛,上部稍扩大,檐部5齿裂,裂片三角形,顶端钝。瘦果圆柱形,有10条棱,被疏毛,长约1.5毫米。冠毛白色,糙毛状,长约6毫米。花期8-12月。
分布(Distribution):产云南、四川、贵州、广西、广东、湖南、江西、福建及台湾等省区,生于林缘或灌丛中。越南北部也有。
用途(Use):
引自中国植物志英文版FOC Vol. 20-21 Page 829, 831
Blumea megacephala (Randeria) C. C. Chang & Y. Q. Tseng in Y. Ling, Fl. Reipubl. Popularis Sin. 75: 11. 1979.
东风草 dong feng cao| Asteraceae  | Blumea
Blumea riparia Candolle var. megacephala Randeria, Blumea 10: 215. 1960.
Subshrubs or shrubs, perennial, scandent; branches elongated, to 4-6 m. Stems woody, 2-3 cm in diam., terete, striate, glabrate or sparsely puberulent particularly on synflorescence axes and on younger parts. Cauline leaves thick, oblong, 9-11 × 2.5-4 cm, glabrate or minutely pilose on surfaces, base obtuse to cuneate, margin remotely mucronulate or mucronulate-denticulate, apex shortly acuminate; veins 5 or 6 pairs. Capitula hemispheric, 10-15 × 12-13 mm, in terminal and axillary lax panicles. Phyllaries in 3 or 4 series, usually distinctly purple tipped, outer ones shorter, linear-lanceolate, 2-4 × ca. 1 mm, with multicellular hairs, inner linear-lanceolate, 8-9 × ca. 0.9 mm, ciliate. Receptacle flat, 6-11 mm in diam., with white, multicellular hairs. Corollas yellow, tubular; marginal florets 8-9 mm, 3- or 4-lobed; central florets 9-10 mm with 5 triangular lobes, lobes with sessile glands and multicellular hairs. Achenes oblong to cylindric, 1.2-1.4 × ca. 0.5 mm, 10-ribbed, sparsely hirsute. Pappus white, 5-6 mm. Fl. Aug-Apr. 2n = 16.
Thickets, grassy slopes at forest margins; 100-1900 m. Fujian, Guangdong, Guangxi, Guizhou, Hunan, Jiangxi, Sichuan, Taiwan, Yunnan, Zhejiang [Japan (Ryukyu Islands), Thailand, Vietnam].

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