PALYNOLOGY AND EMBRYOLOGY IN EUPHORBIACEAE

用扫描电子显微镜和透射电子显微镜观察了无芒蛛亚科(Sensu Webster，)18个部落中代表属的110种植物的花粉。天牛科(Cheilosa)具有具刺的三孔孢粉。在Chrozopreae中，双轴具有独特的双侧花粉，具有两个带孔。在海鞘中，海鞘有一个完整的顶盖，顶盖上有网状的刺突，Argomuellera的顶盖细小或呈网状或微网状。Adelieae和Alclnieae共享盖状三孔沟花粉。Acalypheae具有异质的花粉粒，具有各种外壁纹饰和结构。Dalechampeae的特征是网状外壁。珍珠层具有不寻常的外壁结构，由相互交织的柱状结构组成。大多数鞭毛虫亚科都有孔洞，但孔洞的数量各不相同。广泛的花粉多样性表明，天牛亚科是一个多系分类单元，包括多个异质类群。

Pollen of 110 species representing 64 genera from 17 of the 18 tribes in the Acalyphoideae (sensu Webster, 1989) was examined in SEM and TEM.This subfamily is palynologically diverse. The Cheiloseae (Cheilosa) have spinulate tricolporate pollen. In the Chrozophoreae, Ditaxis has unique bilateral pollen with two zonapertures. In the Pycnocomeae, Pycnocomas has a complete tectum with spinules in a reticulate pattern and Argomuellera is finely or reticulate or microreticulate. The Adelieae and the Alchornieae share operculate tricolporate pollen. The Acalypheae have heterogenous pollen grains with various exine sculptures and structures. The Dalechampieae are characterized by reticulate exines. The Pereae have unusual exine structure composed of interwoven columellae. Most Acalyphoideae have colporate apertures, but the number of apertures varies. The wide range of pollen diversity suggests that the subfamily Acalypohoideae is a polyphyletic taxon including several heterogeneous groups.