叢毛矮柳檢視原始碼討論檢視歷史
叢毛矮柳 |
中文名:叢毛矮柳 學 名:Salix floccosa Burkill 界:植物界 門:被子植物門Angiospermae 綱:雙子葉植物綱Dicotyledoneae 目:楊柳目 科:楊柳科Salicaceae 屬:柳屬Salix 種:叢毛矮柳 |
叢毛矮柳(cóng máo ǎi liǔ,學名 Salix floccosa Burkill),生長於海拔1000-4500米的高山地區。產於中國江蘇省,雲南省,西藏自治區,四川省。本種幼葉下面密被長柔毛,後變叢捲毛或無毛,顯著與本組的其他種有別。 [1]
叢毛矮柳形態特徵
矮小灌木,高約30-50厘米。分枝多。小枝暗褐色;老枝發黑色;當年生枝常被柔毛,老枝無 叢毛矮柳 毛。芽卵形,長3-4毫米,紅褐色,無毛。
葉倒卵形或倒卵狀橢圓形,長2-5厘米,寬1-2厘米,先端鈍,基部狹,上面綠色,無毛,常有光澤,下面在幼時密被灰白色長柔毛,後變叢捲毛或無毛,邊緣具細鋸齒或全緣。
花序與葉同時展開,着生於當年生枝的頂端,軸被柔毛;雄花序長1-3厘米;雄蕊2,花絲基部有長毛;苞片倒卵形,先端鈍圓,外面無毛,內面有疏長柔毛,具腹腺和背腺,背腺較細;
雌花序長約2厘米;子房卵形,無柄,密被柔毛,花柱明顯,2裂,柱頭2裂;苞片倒卵形,先端鈍圓,兩面被疏毛,背面較密;僅有腹腺,長圓形。
花期7月,果期8-9月。 [2]
Salix floccosa Burkill in Journ. Linn. Soc. 26: 529. 1899; Hao in Fedde, Rep. Beih. 93: 57. t. 11: 22. 1936; 西藏植物名錄, 46. 1980.
Shrubs low, to 50 cm tall, much branched. Branchlets dull brown, darker when mature, glabrous; juvenile branchlets downy. Buds russet, ovoid, 3-4 mm, glabrous. Petiole ca. 6 mm; leaf blade obovate or obovate-elliptic, 2-5 × 1-2 cm, abaxially grayish white villous when young, becoming floccose or glabrous, adaxially green, glabrous, often shiny, base narrow, margin entire or serrulate, apex obtuse. Flowering coetaneous. Catkins terminal. Male catkin 1-3 cm; rachis downy; bracts obovate, abaxially glabrous, adaxially sparsely villous, apex obtuse-rounded. Male flower: abaxial gland thinner than adaxial gland; stamens 2, long pubescent at base. Female catkin ca. 2 cm; bracts obovate, both surfaces pilose, apex obtuse-rounded. Female flower: gland adaxial, oblong; ovary ovoid, densely downy, sessile; style conspicuous, 2-cleft; stigma 2-lobed. Fl. Jul, fr. Aug-Sep.
叢毛矮柳生長環境
生長於3600-4000米的高山灌叢中。
叢毛矮柳分布範圍
分布於雲南西北部,西藏東部。模式標本采自雲南麗江(玉龍山)。