赪桐(Clerodendrum japonicum (Thunb.) Sweet )
别 称 贞桐花、状元红、百日红、荷苞花、红花倒血莲
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为马鞭草科大青属的植物,多年生落叶或常绿灌木。形态特征:植株高1.5~2米,茎直立,不分枝或少分枝;幼茎四方形,深绿色至灰白色。叶对生,心形,长15~20厘米,宽16~20厘米,纸质,腹面深绿色,背面灰绿色,叶缘浅齿状;叶柄特长,约为叶片的2倍,长30~35厘米。总状圆锥花序,顶生,向一侧偏斜;花小,但花丝长;花萼、花冠、花梗均为鲜艳的深红色,花期长达半年。花期:5—11月。果圆形,蓝紫色。果期:12月至翌年1月。