苞叶姜大小孢子发生和雌雄配子体发育

对苞叶姜（Pyrgophyllum yunnanense）大小孢子发生和雌雄配子体发育进行了显微观察,研究结果表明：苞叶姜花药2室,药壁发育属基本型,绒毡层为分泌型。小孢子母细胞经减数分裂形成左右对称型四分体,胞质分裂为连续型,成熟花粉粒为2-细胞型;子房下位,3室,胚珠多数,倒生,具双珠被、厚珠心,中轴胎座。大孢子母细胞经减数分裂形成线型（或T形）四分体,珠孔端3个大孢子退化,合点端的1个发育成功能大孢子,胚囊发育为蓼型。比较苞叶姜、黄花大苞姜（Caulokaempferia coenobialis）和海南三七（Kaem pferia rotunda）的早期胚胎学特征,表明苞叶姜与黄花大苞姜系统学关系较近,与海南三七系统学关系较远。在分类等级上,胚胎学证据支持苞叶姜独立成属。     

Pyrgophyllum,a New Genus of Zingiberaceae from China

Pyrgophyllum (Gagnep.) T. L. Wu et Z. Y. Chen is a monotypic genus of Zingiberaceae from China. Originally, it was placed in Kaempferia as a subgenus by Gagnepain (1901), later transferred to Camptandra by Schumann (1904) and to Caulokaempferia by R. M. Smith. (1972). In this paper, the authors suggest that the separation of Pyrgophyllum at generic rank is justified on cytological, morphological and anatomical evidence. It is characterised by the large lamina-like bracts, which are rarely seen in Zingiberaceae. The margin of each bract is adnate to the main axis of the inflorescence at the base and the lip is lobed. Trichomes unicellular, stomata each with 4-7 lateral subsidiary cells, lateral veins are of three various types of vascular bundles: girder-shaped, semigirder-shaped and isolated. The pollen grains are spinecent. The basic chromosome number (x) is 21. The type species, Pyrgophyllum yunnanensis (Gagnep.) T. L. Wu et Z. Y. Chen (Kaempferia yunnanensis Gagnep.), is only distributed in Yunnan and Sichuan provinces of China.