摘 要 :利用光学显微镜对萝藦科鹅绒藤属17种1亚种植物花粉器的形态特征进行观察。结果表明:(1)该属植物花粉器形状大小在各个种间差异较大:花粉块下垂,通常呈球形、长球形和超长球形,平均大小为327.2 μm×183.9 μm;着粉腺呈长圆形、近圆形、近方形和近三角形,平均大小为406.1 μm×231.4 μm。(2)翅果杯冠藤的花粉块柄最不发达,豹药藤的花粉块柄最发达。(3)白薇与朱砂藤、刺瓜与轮叶白前的花粉器特征均较相近。研究结果支持《中国植物志(第63卷)》中对催吐白前组(Sect.Vincetoxicum)的分组处理;支持将娃儿藤属(Tylophora)作为一个独特类群的观点;因国内翅果杯冠藤和美翼杯冠藤的花粉器形态存在差别,故不支持Flora of China(Vol.16)中认为翅果杯冠藤是美翼杯冠藤的错误鉴定与处理。
Abstract:The pollinarium morphology of 17 species and 1 subspecies of Cynanchum were observed under light microscope(LM).The results showed that:(1)The sharp and size of pollinarium of Cynanchum were different from various kinds of species.The pollinia were sagging,and their shape were usually spheroidal,prolate,and perprolate.The average size of pollinia was long 327.2 μm×wide 183.9 μm.The shape of retinaculum were oblong,near roundness,near squares,and near triangle,and their average size was long 406.1 μm×wide 231.4 μm.(2)The caudicle of C.alatum was the least developed,while that of C.decipiens was the most developed.(3)The pollinarium morphology of C.atratum and C.officinale,C.corymbosum and C.verticillatum were similar.The results supported the treatment of Cynanchum Sect.Vincetoxicum in Flora Reipublicae Popularis Sinicae (Vol.63) and supported that Tylophora should be a unique group.It was considered that C.alatum was the false identification of C.callialatum in Flora of China (Vol.16),since the results in this paper showed their pollinarium morphology were different.