A Study On The Spore Morphology Of Aspleniaceae From China

Based on the specimens collected in Herbarium of Pteridophyte Yunnan University(PYU). spore morphology of 62 species 1 variety of Aspleniaceae were studied under scanning electro microscope(SEM). According to the results of observation, spore size, polar view, equatorial view and spore ornamentation were compared and analysized, the aim was to disscuss the relationship between genera and species, a classification key of the taxa was provided,the main results were as follows:1.Spore of 23 species 1 variety were studied for the first time using SEM;2.Spore of Aspleniaceae were monolete and bilateral symmetry, elliptic, broadly elliptic, reniform or subrounded in polar view, fanshaped or semicircle in equatorial view. The polar axis were 22.55-44.83μm,and the equatorial axis were 32.31～ 60.73μm;3.Spore of Aspleniaceae were abundant perispore. Perispore convex outside and form different ornamentation type.The ornamentation type of Aspleniaceae can be divided into 8 types:lophate, pterate, alar-lophate, cribrate, corneate, cristrate, fenestrate, echinate.Cribrate in Aspleniaceae which distributed in China was found for the first time;4. Spore ornamentations indicated:(1) spore ornamentations of Hymenasplenium were consistent,spore ornamentation type of all species were pterate; (2)Some species treated as one species in "Flora of China"(vol.2～3) had got very similar spore ornamentation, such as Asplenium barkamense and Asplenium nesii, Asplenium stenophyllum and Asplenium ensiforme, Asplenium neolaserpitiifolium and Asplenium pseudolaserpitiifolium, Neottopteris salwinensis and Asplenium nidus, Asplenium moupinense and Asplenium yunnanense;5.Spore ornementations of Asplenium wrightioides and Asplenium wrightii were significantly different, the former species (Asplenium wrightioides) was treated as synonym of the later species (Asplenium wrightii) in "Flora of China"(vol.2-3).