作 者 ：Huang Jian-zhong, Li Yang-han, Zhang Yu-ying
期 刊 ：植物分类学报 1993年 3期
Keywords:Cuscuta seeds, hilum, hilum-rim, spermoderm,
Abstract:
The surface ultrastructure of seeds of chinese Cuscuta was observed under
SEM. The main results are as follows: the seed surface could be divided into
three parts: hilum, hilum-rim and spermoderm. The hilum is collar-shaped or
higher or lower than level of hilum-tim. Hilum-rim cells are mostly radiately ar-
ranged and less frequently in reticulate or other types of arrangement. The
spermoderm shows at least three patterns of ornamentation, cerebelloid, striate
or irregular, on which some tuberculate or small clumps of granules could be
found sometimes According to the surface ultrastructure of the hilum, hilum-rim
and spermoderm, the observed dodder seeds could be divided into three types.
The surface characters of dodder seeds are also important both for diagnosis of
species and for quarantine of dodders.