木荷属（山茶科）一新变种——扁果银木荷

Schima argentea Pritz. var. platycarpa Q. Luo, A New Variety of Schima Reinw. (Theaceae ) from Sichuan, China

摘要:

报道了四川德昌县发现的山茶科(Theaceae)木荷属(Schima Reinw.)一新变种——扁果银木荷(Schima argentea Pritz. var. platycarpa Q. Luo)。新变种花瓣长2~2.6 cm, 宽1.6~2.2 cm，内面基部被柔毛，蒴果扁球形，直径1.7~2.1 cm，高1~1.3 cm等特征与原变种相区别。在电子扫描显微镜下观察了银木荷和扁果银木荷的花粉粒，银木荷花粉粒表面纹饰为网状，具穿孔，而扁果银木荷花粉粒外壁为网状，不穿孔。

Abstract:

Schima argentea Pritz. var. platycarpa Q. Luo, a new variety of Schima Reinw. from Xichang, Sichuan, China, is described. This new variety is different from the typical variety by having big petals with pubescence at ventral base, 2-2.6 cm long and 1.6-2.2 cm wide, capsules oblate, 1.7-2.1 cm in diameter and 1-1.3 cm height. Pollen morphology of Schima argentea Pritz. var. argentea and S. argentea Pritz. var. platycarpa Q. Luo were observed under scanning electron microscopy (SEM), the results showed that exine ornamentation of Schima argentea Pritz. var. argentea was reticulate with perforation, and that is reticulate without perforation in this new variety.