維西柳
維西柳 |
中文名:維西柳 學 名:Salix weixiensis 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 目:楊柳目 科:楊柳科 屬:柳屬 種:維西柳 |
維西柳(學名:Salix weixiensis)為楊柳科柳屬的植物,為中國的特有植物。分布於中國大陸的雲南等地。 [1]
目錄
維西柳形態特徵
葉長橢圓狀披針形,長7.5-11厘米,寬2.3-3厘米,先端長漸尖,基部楔形或闊楔形,上面暗綠色,無毛或沿中脈有柔毛,下面蒼白色,無毛或沿中脈有疏毛,幼時兩面有密柔毛,邊緣有粗腺鋸齒;葉柄長3-6毫米,有短柔毛;托葉半卵形,長3-5毫米,有疏長毛,邊緣有疏腺鋸齒。
雌花序與葉同時開放,圓柱狀,長1.4-1.6厘米,果期長達1.8-2厘米,有梗,梗長6-9毫米,有密柔毛,具2-3小葉,小葉倒卵狀長圓形,長1.5-1.8厘米,寬6-8毫米,果期後常脫落,軸有密柔毛;子房卵形或長卵形,長1.5-2毫米,寬1-1.6毫米,僅基部有疏毛,無柄,花柱極短,柱頭2裂;苞片卵形,先端圓或鈍頭,淡褐色,外面下部有長毛,內面近無毛或僅基部有長毛,有緣毛;腺體2,腹腺較寬,背腺較小。
蒴果長2.8-4毫米,無毛或基部有疏毛。雄花未見。[2]花期4月,果期5月。
Salix weixiensis Y. L. Chou, 植物研究, 1 (1-2): 165, 1981.
Shrubs or small trees to 7 m tall. Branchlets brown, glabrous; juvenile branchlets dull brown, pubescent, becoming subglabrescent. Buds ovoid, small, glabrous. Stipules semicordate, 3-5 mm, margin sparsely glandular serrate, villous; petiole 3-6 mm, pubescent; leaf blade long elliptic-lanceolate, 7.5-11 × 2.3-3 cm, abaxially pale, adaxially dull green, both surfaces glabrous or downy along midvein, densely downy when young, base cuneate or broadly cuneate, margin coarsely glandular serrate, apex long acuminate. Male catkin unknown. Female catkin cylindric, 1.4-1.6 cm, to 2 cm in fruit; peduncle 6-9 mm, with 2 or 3 leaflets; leaflets obovate-oblong, 1.5-1.8 cm × 6-8 mm, usually deciduous after anthesis; bracts brownish, ovate, abaxially long pubescent proximally, adaxially subglabrous or long pubescent at base, ciliate, apex rounded or obtuse. Female flower: adaxial gland broad, larger than abaxial gland; ovary ovoid or long ovoid, 1.5-2 × 1-1.6 mm, pilose at base; style very short; stigma 2-lobed. Capsule 2.8-4 mm, glabrous or pilose at base. Fl. Apr, fr. May.
- Thickets, mixed woods; 1900-2600 m. Yunnan
維西柳生長環境
生長於海拔1,950米至2,600米的地區,多生長在灌叢以及雜木林中及路邊、山坡、山坡林中、水邊等。目前尚未由人工引種栽培。
維西柳分布範圍
主要分布於中國雲南等地。