音频解说
形态描述
常绿蔓性灌木。枝绿色，直立或弯曲，4棱形，无毛。叶对生，单叶和三出复叶混生，叶片圆形、长圆状卵形或狭长圆形，长1.5~3.5cm，宽8~11mm，三出复叶的顶生小叶比侧生小叶大，先端钝，有小尖头，基部楔形，全缘或有细微锯齿，中脉上面平坦，下面凸起，侧脉不明显，两面无毛；叶柄长6~9mm，无毛，侧生小叶无柄，顶生小叶近无柄。花大，单生于枝下部叶腋；苞片叶状；花梗长5~7mm，无毛；花萼钟形，萼筒长2mm，顶端6~7裂，裂片叶状，狭长卵形，长5~6mm，先端急尖或渐尖，无毛；花冠黄色，直径通常3.5~4cm，花冠筒长7~10mm，呈半垂瓣，裂片椭圆形或长圆形，长1.4~1.8cm，宽0.9~1.4cm，先端钝圆，有小尖头；雄蕊2，内藏。浆果未见。花期4月。染色体数目为2n=24、26。
分布地区
杭州各公园道路常见栽培。分布于我国西南地区。
主要用途
供观赏。
中国植物志英文版
Jasminum primulinum Hemsley. Subshrubs erect, evergreen, 0.5-5 m. Branchlets 4-angled, glabrous. Leaves opposite, 3-foliolate or simple at base of branchlets; petiole 0.5-1.5 cm; leaf blade broadly ovate or elliptic, sometimes suborbicular, 3-5 × 1.5-2.5 cm, along with leaflet blade subleathery, glabrescent, veins obscure; leaflet blade narrowly ovate or ovate-lanceolate to narrowly elliptic, base cuneate, apex blunt and mucronulate, terminal one 2.5-6.5 × 0.5-2.2 cm, basally decurrent into a short petiolule, lateral ones sessile, 1.5-4 × 0.6-2 cm. Flowers usually solitary, axillary or rarely terminal; bracts leafy, obovate or lanceolate, 5-10 mm. Pedicel 3-8 mm. Calyx campanulate; lobes 5-8, leafy, lanceolate, 4-7 mm. Corolla yellow, funnelform, 2-4.5 cm in diam.; tube 1-1.5 cm; lobes 6-8, doubled in cultivation, broadly obovate or oblong, 1.1-1.8 cm. Berry ellipsoid, 6-8 mm in diam. Fl. Nov-Aug, fr. Mar-May. 2n = 24, 26*. * Ravines, woods; 500-2600 m. Guizhou, SW Sichuan, Yunnan.----from “Flora of China”
