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紫叶李

紫叶李

  紫叶李,别名:红叶李,蔷薇科李属落叶小乔木,高可达8米,原产亚洲西南部,中国华北及其以南地区广为种植。叶常年紫红色,著名观叶树种,孤植群植皆宜,能衬托背景。尤其是紫色发亮的叶子,在绿叶丛中,像一株株永不败的花朵,在青山绿水中形成一道靓丽的风景线。 形态特征 编辑 灌木或小乔木,高可达8米;多分枝,枝条细长,开展,暗灰色,有时有棘刺;

  小枝暗红色,无毛;冬芽卵圆形,先端急尖,有数枚覆瓦状排列鳞片,紫红色,有时鳞 片边缘有稀疏缘毛。叶片椭圆形、卵形或倒卵形,极稀椭圆状披针形,长(2)3-6厘米,宽2-3(2)厘米,先端急尖,基部楔形或近圆形,边缘有圆钝锯 齿,有时混有重锯齿,上面深绿色,无毛,中脉微下陷,下面颜色较淡,除沿中脉有柔毛或脉腋有髯毛外,其余部分无毛,中脉和侧脉均突起,侧脉5-8对;叶柄 长6-12毫米,通常无毛或幼时微被短柔毛,无腺;托叶膜质,披针形,先端渐尖,边有带腺细锯齿,早落。 花1朵,稀2朵;花梗长1-2.2厘米。无毛或微 被短柔毛;花直径2-2.5厘米;萼筒钟状,萼片长卵形,先端圆钝,边有疏浅锯齿,与萼片近等长,萼筒和萼片外面无毛,萼筒内面有疏生短柔毛;花瓣白色, 长圆形或匙形,边缘波状,基部楔形,着生在萼筒边缘;雄蕊25-30,花丝长短不等,紧密地排成不规则2轮,比花瓣稍短;雌蕊1,心皮被长柔毛,柱头盘 状,花柱比雄蕊稍长,基部被稀长柔毛。 核果近球形或椭圆形,长宽几相等,直径1-3厘米,黄色、红色或黑色,微被蜡粉,具有浅侧沟,粘核;核椭圆形或卵球 形,先端急尖,浅褐带白色,表面平滑或粗糙或有时呈蜂窝状,背缝具沟,腹缝有时扩大具2侧沟。花期4月,果期8月。

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