鋸齒葉墊柳檢視原始碼討論檢視歷史
鋸齒葉墊柳 |
中文名:鋸齒葉墊柳 學 名:Salix crenata 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:楊柳目 科:楊柳科 屬:柳屬 種:墊柳 變 種:鋸齒葉墊柳 |
鋸齒葉墊柳(jù chǐ yè diàn liǔ,學名:Salix crenata),為雙子葉植物綱、楊柳科、柳屬的植物,是中國的特有植物。分布在中國大陸的雲南等地,生長於海拔4,300米至4,800米的地區,一般生長在高山灌叢或潮濕的岩縫中,目前尚未由人工引種栽培。 [1]
鋸齒葉墊柳形態特徵
主幹短,彎曲,暗褐色,沿地表下橫走,干、枝上生有不定根。幼枝短而密集,黃褐色,當年生枝有疏短柔毛,後變無毛。芽小,卵形,無毛。
葉密集,枝條全被覆蓋,卵形,長約8毫米,寬約3.5(-5)毫米,革質,先端急尖,基部楔形,上面綠色,無毛,有褶皺,具光澤,葉脈明顯凹下,下面淡綠色,中脈隆起,側脈不顯,邊緣具疏而整齊的腺鋸齒,幼葉下面有長柔毛,後無毛;葉柄長約4毫米,幼時在下面生有長柔毛。
花序極小,少花,約5花,軸有稀疏的短柔毛;苞片倒卵形,黃綠色,膜質,先端圓形,僅內面的基部及邊緣有柔毛;雄蕊2,長約3.5毫米,約為苞片的2倍,花絲僅基部具短柔毛,花葯長圓形,黃色;
腺體2,腹生和背生,腹腺長圓柱形,基部稍寬,背腺較細,約與腹腺等長,有時先端2淺裂;子
房長圓形,長約3毫米,約與苞片等長,具長柄,無毛,花柱短,2深裂,柱頭2裂,僅具腹腺,細圓柱形,幾與子房柄等長,約為子房長的1/3。
蒴果長卵形,無毛。花期7月,果期8-9月。 [2]
Salix crenata Hao in Fedde, Rep. Beih. 93: 50. t. 6: 11. 1936.
Shrubs cushion-shaped; trunk dull brown, short, twisted, rooting. Branchlets yellowish brown; young branchlets dense, short; juvenile branchlets sparsely pubescent, glabrescent. Buds ovoid, small, glabrous. Leaves crowded, covering branchlets; petiole ca. 4 mm; leaf blade ovate, ca. 8 × 3.5(-5) mm, leathery, abaxially greenish, villous when young, adaxially green, glabrous, wrinkled, shiny, base cuneate, margin with loosely and regularly spaced, glandular saw teeth, apex acute; midvein raised abaxially, impressed adaxially. Catkins very small, ca. 5-flowered; bracts yellowish green, obovate, membranous, marginally and adaxially pubescent at base, apex rounded. Male flower: adaxial gland cylindric, abaxial gland thinner than adaxial gland, sometimes 2-lobed; stamens 2, ca. 3.5 mm, ca. 3 × as long as bracts; filaments pubescent at base; anthers yellow. Female flower: adaxial gland cylindric, nearly as long as stipe; ovary cylindric, ca. 3 mm, glabrous, ca. as long as bracts, long stipitate; style short, 2-parted; stigma 2-lobed. Capsule long ovoid. Fl. Jul, fr. Aug-Sep.
- Thickets, rock crevices; 4300-4800 m. E Xizang, NW Yunnan
鋸齒葉墊柳生長環境
主要生長於海拔4,300米至4,800米的地區,一般生長在高山灌叢或潮濕的岩縫中。
鋸齒葉墊柳分布範圍
主要分布於中國大陸的雲南等地。