頭序蕘花檢視原始碼討論檢視歷史
頭序蕘花 |
中文學名:頭序蕘花 門:被子植物門 綱:雙子葉植物綱 目:瑞香目 科:瑞香科 屬:蕘花屬 |
頭序蕘花形態特徵
小灌木,高0.5-1米;枝纖細,當年生枝圓柱形,多為綠色,無毛,一年生枝紫褐色。
頭序蕘花 葉膜質,對生或近對生,橢圓形或倒卵狀橢圓形,很少為倒卵狀長圓形,長l-2厘米,寬0.4-0.9厘米,先端鈍或微鈍,基部漸狹,兩面均無毛,或初被稀少的糙伏毛後漸變為無毛,上面黃綠色,下面稍蒼白色,側脈在每邊5-7條,與中肋成尖角展開,微彎,在下面凸出;葉柄極短,長0.5-1.5毫米。
頭狀花序3-7花,着生於纖細的花序軸上,總花梗極細,絲狀,長1-1.8厘米;花黃色,無梗,長約7毫米,徑約1毫米,外面被絹狀糙伏毛,頂端4裂,裂片卵形或卵狀長圓形,長約1.5毫米;雄蕊8,2列,上列4枚着生在花萼管喉部,下列4枚,在花萼管中部稍上着生,花葯卵狀長圓形,長0.8-1毫米,花絲短;花盤鱗片1枚,線形,約等於子房長度的1/3,具2或3齒;雌蕊長約3毫米,子房被糙伏毛狀柔毛,花柱長0.5毫米,柱頭頭狀,紫色。
果卵圓形,兩端漸尖,長約4.5毫米,黃色,略被糙伏毛,外為宿存花萼所包被;種子卵珠形,暗黑色,長約4毫米。
花期夏秋間。
Shrubs 0.5-1 m tall. Branches green, usually turning purple-brown in first year, terete, slender, glabrous. Leaves opposite or subopposite; petiole 0.5-1.5 mm; leaf blade dull yellowish green adaxially, paler abaxially, elliptic or obovate-elliptic, rarely obovate-oblong, 1-2 × 0.4-1 cm, membranous, both surfaces glabrous or sparsely strigose and glabrescent, base gradually narrowed, apex obtuse or slightly obtuse; lateral veins 5-7 pairs, oblique, slightly curved upward, raised abaxially. Inflorescences terminal, capitate, 3-7-flowered; peduncle 1-2 cm, very slender. Pedicel absent. Calyx yellow, 7-8 × ca. 1 mm, exterior sericeous-strigose; lobes 4, ovate or ovate-oblong, ca. 1.5 × 1 mm. Stamens 8, lower whorl inserted above middle of calyx tube, upper whorl at throat; filaments short; anthers ovoid-oblong, 0.8-1 mm. Disk scale 1, linear, ca. 1 mm, apex 2- or 3-dentate. Ovary ca. 3 mm, strigose-pubescent; style very short, ca. 0.5 mm; stigma purple, capitate. Drupe yellow or orange, ovoid-globose, ca. 5 mm, slightly strigose, tapering at both ends, enclosed by persistent calyx. Fl. summer-autumn.
頭序蕘花生長環境
生長於海拔300-1000米的向陽山坡或林下。