音频解说
形态描述
落叶灌木，高1~3m。小枝直立，4棱形，小枝绿色或黄绿色，无毛，具薄片状髓。单叶，对生，叶片长椭圆形至披针状或倒卵状椭圆形，长3.5~15cm，宽1~4cm，近革质，先端锐尖，基部楔形，叶片上半部分边缘有锯齿或全缘，叶柄6~12cm。花先叶开放，1~3朵簇生于叶腋；花梗长5~7mm，基部有数枚钻形苞片，花萼钟形，4裂至中部，裂片卵形或椭圆形，长2~3mm，为花冠筒之半，宽1~1.5mm，先端钝，缘有睫毛，花冠黄色，钟形，4深裂，裂片狭长圆形，先端钝，雄蕊2，着生于花冠筒基部，与花冠筒近等长，雌蕊柱头2裂。蒴果卵球形，长1~1.5cm，直径6~8mm，顶端尖，基部圆形，表面常散生棕色鳞秕或疣点，果梗长6~7mm，基部苞片宿存。染色体数目为2n=28。
分布地区
原产我国，生于海拔800m以下的沟谷或溪边杂木林下或灌丛中。杭州各公园庭院常见栽培。
主要用途
花供观赏；果实入药；种子油供制皂和化妆品用。
其它
本种与连翘的主要区别在于：连翘的枝条常下垂，中空，单叶或有时形成三出复叶，花萼裂片长5~7mm，与花冠筒近等长。
中国植物志英文版
Rangium viridissimum (Lindley) Ohwi. Shrubs glabrous except for calyx lobes. Branches upright, to 3 m; branchlets green or yellow-green; pith lamellate. Leaves simple; petiole 6-12 mm; leaf blade long elliptic to lanceolate or long obovate-elliptic, 3.5-15 × 1-4 cm, subleathery, base cuneate, margin serrate or entire along distal half, apex acute. Flowers 1-3(-4) in leaf axils. Pedicel 3-7 mm. Calyx lobes broadly ovate or elliptic, 2-4 mm, ciliate. Corolla deep yellow outside, tinged with orange-yellow stripes inside; tube 5-6 mm; lobes narrowly oblong, 0.6-1.8 cm, revolute. Pistil 5.5-7 mm in flowers with stamens 3.5-5 mm or ca. 3 mm in flowers with stamens 6-7 mm. Capsule ovoid, 1-1.5 cm × 6-10 mm, lenticellate; stalk 3-7 mm. Fl. Mar-Apr, fr. Aug-Nov. * Ravines, margin of woods near river valleys, streamsides. Anhui, Fujian, Hubei, Hunan, Jiangsu, Jiangxi, NW Yunnan, Zhejiang Widely cultivated in all parts except for S China.----from “Flora of China”
