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Poranthereae : ウィキペディア英語版 | Poranthereae
Poranthereae is a tribe in the flowering plant family Phyllanthaceae. It is one of ten tribes in the family, and one of four tribes in the subfamily Phyllanthoideae. Poranthereae comprises about 111 species, distributed into eight genera. The largest genera and the number of species in each are ''Actephila'' (31), ''Meineckia'' (30), and ''Andrachne'' (22). The tribe consists of herbs, shrubs, and small to medium trees. They have a cosmopolitan distribution, occurring on all continents, except Antarctica. The circumscription and classification of Poranthereae were substantially revised following phylogenetic analysis of DNA sequences from members of the family Phyllanthaceae.〔 Within Poranthereae, groups of related genera are strongly correlated with habitat and geographical distribution. For example, ''Notoleptopus'', ''Pseudophyllanthus'', and ''Poranthera'' are restricted to the Old World Southern Hemisphere. ==Description== Monoecious, sometimes dioecious herbs, shrubs, or trees to 6m tall. Thorns or other armature absent. Stipules present, sometimes leaf-like is some ''Meineckia''. Petioles present or absent, not pulvinate. leaves simple, arrangement alternate, subopposite, or in some ''Poranthera'', opposite. margins entire. Inflorescences axillary, or rarely, apparently terminal. Flowers solitary to fasciculate. Sepals free, greenish, persistent. Petals present or absent, often partly adnate to the nectary disk, equal to the sepals or shorter, white or greenish, usually larger in staminate than in pistillate flowers. Disk present, extrastaminal; annular or divided into alternisepalous segments or glands. Stamens opposite the sepals, free or fused for up to 9/10 of their length. Anthers latrorse, at least in bud, opening by longitudinal slits, or in ''Poranthera'', by pores. Ovary usually divided into three locules. Two ovules in each locule. Styles free to almost completely fused. Fruit explosively dehiscent. Seeds usually two per locule; sometimes one in ''Actephila'' and ''Meineckia''.
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