娃儿藤属（萝藦科）植物花粉器形态

Pollinaria Morphology of Tylophora (Asclepiadaceae)

摘要:

用光镜对我国萝藦科(Asclepiadaceae)娃儿藤属(Tylophora) 17种植物的花粉器形态进行了观察。结果表明，着粉腺的形态有4种类型：长圆形、近方形、三角形和倒立三角形。花粉块的形态有3种类型：球形、长球形和超长球形。花粉块柄的长度、着粉腺和花粉块的形态和大小在种间存在较显著的差异，可作为区分种的辅助特征，对娃儿藤属植物的分类有较大意义。

Abstract:

Pollinaria morphology of 17 species of Tylophora in China was observed under light microscope (LM). Four types of retinaculum (oblong, square, triangle and inverse triangle) and three types of pollinia (spheroidal, prolate and perprolate) were observed. The length of the caudicle, the shape and size of retinaculum and pollinia varied markedly. So these characters could be used to discriminate different species within Tylophora. Therefore, they were of significance in studying on classification of Tylophora.