截苞柳查看源代码讨论查看历史
| 截苞柳 |
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中文名:截苞柳 学 名:Salix resecta 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 目:杨柳目 科:杨柳科 属:[柳属]] 组:绵毛柳组 种:截苞柳 |
截苞柳（学名：Salix resecta）为杨柳科柳属的植物。分布于中国大陆的云南、四川等地，生长于海拔2,800米至4,250米的地区，多生长在山谷湿地，目前尚未由人工引种栽培。 [1]
截苞柳形态特征
灌木，高1-2米。小枝粗壮，常集生于干或大枝的上部，褐色或紫褐色，无毛，有光泽。
叶常集生在小枝的端部，长圆形或微倒卵状椭圆形，长2-2.5 (-3.5)厘米，宽5-13 (-16)毫米，先端钝或急尖，基部钝，上面有疏柔毛，下面毛较多，苍白色，全缘；叶柄短；上年的落叶发红色。
花序多着生在枝端部，侧生，有花序梗，具3-6个正常叶；雄花序长约3厘米，粗6-8毫米；雄蕊2，花药金黄色，花丝离生，达中部以上有柔毛，长5毫米；苞片近圆形，先端截形或圆截形，少数微缺，约为花丝长的1/2,两面及边缘有柔毛，下部稍多；腺体2，背生和腹生；
雌花序长2-5.5厘米，粗4-7毫米；子房卵形至长卵形，无柄，密被白色或淡黄色柔毛，花柱长，2裂，柱头2裂；苞片同雄花，通常只有1腹腺（个别花具有1小背腺），长约为苞片的1/3。
蒴果长约3毫米，有短柄。花期5月下旬，果期6月中下旬。[2]
Salix resecta Diels in. Nat. Bot. Gard. Edinb. 5: 281. 1912; Schneid. in Sarg. Pl. Wils. 3: 121. 1916; Hand.-Mazz. Symb. Sin. 7: 81. 1929; Hao in Fedde, Rep. Beih. 93: 95. t. 36: 71. 1936.
Shrubs to 2 m tall. Lateral branches usually together on distal part of trunk or main branches, brown or purplish brown, stout, glabrous, shiny. Leaves clustered at apex of branchlets; petiole short; leaf blade oblong or slightly obovate-elliptic, 2-2.5(-3.5) × 0.5-1.3(-1.6) cm, abaxially pale, downy, adaxially pilose, base obtuse, margin entire, apex obtuse or acute. Catkins lateral on distal part of branchlets. Male catkin ca. 3 cm × 6-8 mm; peduncle with 36 leaflets; bracts suborbicular to obovate-oblong, ca. 1/2 as long as filaments, downy, ciliate, apex truncate or rounded-truncate, rarely retuse. Male flower: glands adaxial and abaxial; stamens 2; filaments free, ca. 5 mm, downy nearly throughout; anthers golden yellow. Female catkin 2-5.5 cm × 4-7 mm; bracts obovate-oblong, nearly as long as ovary. Female flower: adaxial gland ca. 1/3 as long as bracts, abaxial gland rarely present and small; ovary ovoid to long ovoid,white or yellowish pubescent, sessile; style long, 2-cleft; stigma 2-lobed. Capsule ca. 3 mm; stipe short. Fl. May, fr. Jun.
截苞柳生长环境
生长于海拔2800-4250米的山谷湿地。