形态描述

落叶灌木，高达5米。小枝粗壮，无毛或疏生柔毛。叶片宽椭圆形或倒卵形，长6-12cm，宽3-7cm，先端突尾尖，基部阔楔形或圆形，边缘具细钝锯齿，上面仅中脉疏生平贴毛，下面中脉和侧脉疏生平贴毛，侧脉4-6对，明显；叶柄长5-15mm。聚伞花序具有1至数朵花，生于短枝叶腋或顶端；总花梗长2-10mm，萼筒无毛，萼裂片线状披针形，长约8mm；花冠初时淡红色或带黄白色，后变深红色，长2.5-4cm，漏斗状钟形，基部1/3以下突狭。蒴果柱状长圆形，长1-2cm。花期5-6月，果期9-10月。

分布地区

西湖景区（湖滨、花圃、茅家埠、花港）有栽培；分布于广东、江苏、江西、山东；日本也有分布。

中国植物志英文版

Primula planiflora Handel-Mazzetti. Herbs perennial, efarinose, glabrous. Leaves forming a rosette; petiole indistinct or sometimes nearly as long as leaf blade, broadly winged; leaf blade obovate-elliptic to oblanceolate, (2.5--)4--10(--13) X 1.2--5 cm, strongly tapering to base, margin regularly denticulate, apex rounded. Scapes 20--45 cm, elongating to 60 cm in fruit; umbels 2--6, superimposed, 3--10-flowered; bracts linear-lanceolate, 5--10 mm. Pedicel 1--2 cm. Flowers heterostylous. Calyx campanulate, ca. 5 mm, parted to 1/3; lobes triangular to oblong, apex subobtuse. Corolla deep purplish crimson or rose-purple; tube 0.9--1.1 cm; limb spreading, 1.8--3 cm wide; lobes obovate to suborbicular, 8--9.5 X 6--8 mm, apex usually 2-cleft. Pin flowers: stamens ca. 2 mm above base of corolla tube; style ca. 6.5 mm. Thrum flowers with positions reciprocal. Capsule ovoid, slightly longer than calyx. Fl. May-Jul. 2n = 22@. * Wet areas, inundated meadows; 2500--3100 m. W Sichuan, C and N Yunnan----from “Flora of China”