延龄草科四属花粉形态的研究

对延龄草科重楼属Paris L.延龄草属Trillium L.Medeola L.属和Scoliopus Torr.属以及百合科百合属Ｌilium L.和萱草属Ｈemerocallis L.花粉进行了光镜和电镜的观察和比较。结果表明，在延龄草科中，重楼属，Medeola属和Scoliopus属花粉具有较多的相似性：具单一远极沟，极面观椭圆形，外壁为网状纹饰或皱波－网状纹饰。而延龄草属花粉与它们的差异则较大，为圆形，无萌发孔，外壁非网状纹饰，而是颗粒状，疣状，芽孢状，星状和微刺状等纹饰。百合属中的Lilium michauxii和萱草属中的金针菜Hemerocallis citrina花粉均为单一远极沟，外壁表面为网状纹饰。但其网脊特别粗，具不规则突起并形成棱角（H.citina)或由许多排列成念珠状的、形状不一的分子组成（Lilium michauxii)，结构特别复杂。就其萌发孔类型和纹饰特征看，它们与延龄草科中的重楼属，Medeola属和Scoliopus属花粉具有较多的性。花粉外壁的层次结构在延龄草科各属之间（延龄草属除外），甚至在延龄草科与百合科之间均没有多大的差异。

Studies on Pollen Morphology of Four Genera of Trilliaceae

The pollen grains of Paris L.,Trillium L.,Medeola L. and Scoliopus Torr. in Trilliaceae , and of Lilium L. and Hemerocallis L. in Liliaceae were examined by LM and SEM. The result shows that Paris, Medeola and Scoliopus have pollen characterized by monoanacolpate aperture and foveolate or reticulate(or compound reticulate) exine sculpture . The genus Trillium, however, has inaperturate pollen and various exine sculptures including granulate, verrucate, gemmate, starred and spinulate types, but absent of reticulate type. The pollen of Scoliops is peculiar in exine sculpture by having compound reticulum supported by many thick ridges. The genera Lilium L. and Hemerocallis L. have pollen of monoanacolpate aperture and very complicated reticulate sculpture, which is similar to that of Paris, Medeola and Scoliopus. There is no obvious difference in exine stratification of pollen grains among 4 genera of Trilliaceae except the genus Trillium which has a discontinuous foot layer, but the others have continuous and thick foot layer. There is little difference between Trilliaceae and Liliaceae in exine stratification.