作 者 ：Wang Ping-Li, Chang King-Tang
期 刊 ：植物分类学报 1988年 4期
Keywords:Cyclobalanopsis, Quercus, Pollen morphology, Microstructure, Ultrastructure,
Abstract:
The present paper deals with pollen morphology of 19 species belonging to Cyclo-
balanopsis and of 31 species belonging to Quercus from China. All pollen grains were ex-
amined under light microscope and scanning electron microscope, and those of 4 species of
Cyclobalanopsis and of 8 species of Quercus were examined under transmission electron micro-
scope.
Pollen grains of Cyclobalanopsis are spheroidal or subspheroidal, 25.2(18.9-31.5) ×23.1
(16.8-27.3) μm in size. Mostly 3-colporoidate, rarely 3-colpate or 3-colporate. The exine is
2-layered, 1.1-1.9 μm thick, sexine thicker than nexine, finely granulate under LM, granula-
te, spinulate, verrucate under SEM.
Pollen grains of Cyclobalanopsis and of evergreen members of Quercus are very similar
to each other in size, aperture and ornamentation of exine, but there are some differences in
pollen grains between Cyclobalanopsis and deciduous members of Quercus. Therefore, Pollen
morphology supports the treatment of Cyclobalanopsis as a subgenus of Querc