亞東毛柳
亞東毛柳 |
中文名:黑龍江 學 名:Salix yadongensis 界:植物界 門:被子植物門Angiospermae 綱:雙子葉植物綱Monocotyledoneae 亞 綱:原始花被亞綱 Archichlamydeae 目:楊柳目 Salicales 科:楊柳科 Salicaceae 屬:柳屬 Salix 組:紫枝柳組 Sect. Heterochromae 種:亞東毛柳 分布區域:中國西藏 |
亞東毛柳(學名:Salix yadongensis),為雙子葉植物綱、楊柳科、柳屬的植物,為中國的特有植物。分布在中國大陸的西藏等地,生長於海拔2,820米的地區,常生長在河邊,目前尚未由人工引種栽培。 [1]
目錄
亞東毛柳形態特徵
灌木或小喬木。當年生幼枝密被絨毛,微褐綠色。葉橢圓形或長圓狀橢圓形,長5-7厘米,寬約2(-3)厘米,先端急尖,基部圓形,上面草綠色,下面發白色,多少有毛,或僅中脈有毛,邊緣有不明顯的鋸齒,或全緣;葉柄短,有絨毛,托葉卵形。
花序圓柱形,長4-5厘米,粗約1厘米,有長的花序梗,着生(3-) 5個小葉;子房微長圓狀卵形,具疏柔毛,花柱長為子房的1/3-1/2,有長柄; 苞片倒卵形,先端截形,常具不規則的牙齒,近無毛,或僅外面基部有柔毛和疏緣毛; 腺1,腹生,條形,比子房柄稍短或等長。[2]
花期5月下旬-6月上旬。
Salix yadongensis N. Chao,植物分類學報, 17 (4): 106. 圖4: 12. 1979; 西藏植物名錄, 49. 1980.
Salix bhutanensis Floderus var. yadongensis (N. Chao) N. Chao.
Shrubs or small trees. Juvenile branchlets densely tomentose, slightly brownish green. Stipules ovate; petiole short, tomentose; leaf blade elliptic or oblong-elliptic, 5-7 × 2(-3) cm, abaxially whitish, ± pilose, at least along midvein, adaxially grass green, base rounded, margin entire or indistinctly serrate, apex acute. Male catkin unknown. Female catkin terete, 4-5 × ca. 1 cm; peduncle long, with 3-5 leaflets; bracts obovate, pilose only abaxially at base, margin usually irregularly dentate, apex truncate. Female flower: adaxial gland shortly ligulate, ca. as long as or shorter than stipe; ovary cylindric-ovoid, pilose, long stipitate; style 1/3-1/2 as long as ovary. Fl. May-Jun.
- Riversides; circa 2800 m. S Xizang (Yadong Xian)
Similar to Salix trichocarpa but bracts obovate, base pilose abaxially, margin usually irregularly dentate, ciliate, apex truncate; style shorter; ovary oblong-ovoid.
亞東毛柳生長環境
生長於海拔2820米的河邊。
亞東毛柳分布範圍
主要產自中國西藏。