對葉柳檢視原始碼討論檢視歷史
對葉柳 |
中文名:對葉柳 學 名:Salix salwinensis Hand.-Mazz. 界:植物界 門:被子植物門Angiospermae 綱:雙子葉植物綱Monocotyledoneae 目:楊柳目 科:楊柳科Salicaceae 屬:柳屬Salix 種:對葉柳 |
對葉柳(duì yè liǔ,學名 Salix salwinensis Hand.-Mazz.異名:Salix salwinensis var. radinostachya ),灌木,高1米以上。幼枝,芽都有密毛。主要分布於雲南西北部(維西、德欽及高黎貢山)。 [1]
對葉柳形態特徵
灌木,高1米以上。幼枝,芽都有密毛。葉對生,披針形,4-8厘米長,1.5-2厘米寬,先端急尖或漸尖,基部楔形,或近圓形,兩面都密被絨毛,有時上面毛短,下面淺綠色,全緣;葉柄短,長約3-4毫米;托葉披針形,邊緣有齒。
雄花序無梗,長約3厘米,5毫米粗;雄蕊2,離生,至中部或至中部以上有柔毛;苞片倒卵形,先端近截形,外面和邊緣有柔毛,內面近無毛;腺體2,背腺比腹腺稍小;雌花序圓柱形,長4-6厘米,花序梗短,長約0.5-1厘米,基部有2-4枚長圓形的小葉;
子房卵形,長約2.5毫米,無柄,密被柔毛,花柱長,2深裂,柱頭2裂;苞片長圓形,先端近截形或鈍,外面及邊緣有長柔毛,內面近無毛,開花時與子房等長或稍長;腺體1,卵狀長圓形。
蒴果長約5毫米。 [2]
Salix salwinensis Hand.-Mazz. in Sitzg. Akad. Wiss. Wien. Math.-Nat. 63: 95. 1926; id. Symb. Sin. 7: 75. t. 1: 9, 10. 1929; Hao in Fedde, Rep. Beih. 93: 94. t. 34: 68. 1936.——S. salwinensis radinostachya Hand.-Mazz. 1. c. 76. 1929.
Shrubs to more than 1 m tall. Young branchlets and buds densely pilose. Leaves opposite, stipulate, shortly petiolate; stipules lanceolate; leaf blade lanceolate or oblanceolate, 4-8 × 1.5-2 cm, abaxially tomentose, greenish, adaxially tomentose or pubescent, green, base cuneate or subrounded, margin entire, apex acute or acuminate. Male catkin sessile; bracts obovate, abaxially and marginally downy, adaxially subglabrous, apex subtruncate. Male flower: adaxial gland slightly larger than abaxial one; stamens 2, distinct; filaments downy for ca. 1/2 their length or nearly throughout. Female catkin cylindric, 4-6 cm; peduncle 5-10 mm, with 2-4 oblong leaflets; bracts oblong, as long as or slightly longer than ovary at anthesis, abaxially and marginally villous, adaxially subglabrous, apex subtruncate or obtuse. Female flower: gland adaxial, ovate-oblong; ovary ovoid, ca. 2.5 mm, downy, sessile; style long, 2-parted; stigma 2-lobed. Capsule ca. 5 mm.
對葉柳生長環境
主要生長於海拔2900-3200米的森林中。
對葉柳分布範圍
主要分布於雲南西北部(維西、德欽及高黎貢山)。模式標本采自雲南西部。