【摘要】 <正> 本属与其近亲属粉背蕨属(Aleuritopteris)及碎米蕨属(Cheilosoria)的区别,主要在于本属夏绿、中生,根状茎及叶柄的鳞片大,长圆形或卵圆披针形,先端长钻状,边缘有锯齿或有具柄的腺体;叶片长圆披针形,或有时为卵圆形,长为宽的2—3(4)更多还原

【Abstract】 The new genus Leptolepidium is a segregate form of the classical but much neglected genus Aleuritopteris Fee, from which the genus is distinguished by the herbaceous summer-green leaves only sparcely farinose or quite naked underneath, by broad, oblong-lanceolate, light-colored thin scales on the rhizome with denticulate or glandular-ciliate margin and longi-subulate apices, by continuous indusium with entire margin and by trilet globose-triangular spores with subreticulate ornamentation, as diagnosed above. Thus, the new genus as typified by Cheilanthes dalhousiac and its allies is very distinct from Aleuritopteris (e. g. A. farinosa (Forsk.) Fee, Which it has hitherto been always associated by authors. A small genus of 5-6 species all found in China with a few ranging over to the neighbouring regions, such as Japan, Korea, Far Eastern Regions of USSR and Indo-Himalayas.更多还原