圓齒墊柳
圓齒墊柳 |
中文名:圓齒墊柳 學 名:Salix anticecrenata 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 組:青藏墊柳組 種:墊柳 變 種:圓齒墊柳 |
圓齒墊柳(yuán chǐ diàn liǔ,學名:Salix anticecrenata)是楊柳科柳屬的植物。分布於尼泊爾以及中國大陸的西藏、雲南等地,生長於海拔3,300米至4,200米的地區,常生長在山坡和山頂潮濕處,目前尚未由人工引種栽培。 [1]
目錄
圓齒墊柳形態特徵
葉 墊狀灌木,高僅數厘米。
葉橢圓形或倒卵狀橢圓形,長約1.5厘米,寬約7毫米,先端急尖,基部楔形,上面綠色,稍發皺,下面淺綠色,兩面幾無毛,側脈約4對,邊緣在中部以上有圓鋸齒;葉柄長約1毫米。
花
花與葉同時開放或葉後開花;花序橢圓狀頭形,有6-8朵花,着生在當年生枝的頂端;雄蕊2,花絲離生,無毛,長2-2.6毫米,花葯橢圓形,黃色;
苞片常圓形,與花絲近等長,兩面無毛,有3條脈,邊緣有疏緣毛,近膜質,同色;有背、腹腺;
子房狹卵形,長1.3-1.5毫米,有短柄,尢毛,花柱短,2裂,柱頭2裂;苞片同雄花;僅1腹腺,與子房柄等長或稍短。[2]
Salix anticecrenata Kimura in H. Ohashi, Fl. Himal. (Third Rep.) 14. t. 8. 1975; 西藏植物名錄, 44. 1980.
Shrubs cushion-shaped, to a few cm tall. Petiole ca. 1 mm; leaf blade elliptic or obovate-elliptic, ca. 1.5 cm × 7 mm, abaxially greenish, both surfaces subglabrous, adaxially green, slightly wrinkled, base cuneate, margin crenate distally, apex acute; lateral veins 4 on each side of midvein. Flowering coetaneous or serotinous. Catkins terminal, ellipsoid-capitate, 5- or 6-flowered; bracts usually orbicular, nearly as long as filaments, submembranous, glabrous, sparsely ciliate, 3-veined. Male flower: glands adaxial and abaxial; stamens 2, distinct, glabrous, 2-2.5 mm; anthers yellow, ellipsoid. Female flower: gland adaxial, ca. as long as stipe or slightly shorter; ovary narrowly ovoid, 1.3-1.5 mm, glabrous, shortly stipitate; style short, 2-cleft; stigma 2-lobed.
Mountain slopes; 3300-4200 m. W Sichuan, Xizang, NW Yunnan [Nepal]
圓齒墊柳生長環境
圓齒墊柳 生長於海拔3300-4200米的山坡或山頂潮濕處。