报道了采自云南省景洪市的中国铁角蕨科膜叶铁角蕨属(Hymenasplenium)一新记录植物——素功膜叶铁角蕨(Hymenasplenium wusugongii Li Bing Zhang,W.B.Liao&K.W.Xu)。素功膜叶铁角蕨为近年发表的新种,之前仅发现于老挝北部琅勃拉邦...报道了采自云南省景洪市的中国铁角蕨科膜叶铁角蕨属(Hymenasplenium)一新记录植物——素功膜叶铁角蕨(Hymenasplenium wusugongii Li Bing Zhang,W.B.Liao&K.W.Xu)。素功膜叶铁角蕨为近年发表的新种,之前仅发现于老挝北部琅勃拉邦区,其叶片狭卵形至狭三角形,宽达12 cm,先端渐尖,一回羽状,分离羽片6~12对,羽柄较长,羽片基部下侧缺失1或2条小脉,是膜叶铁角蕨属中形态较为独特的一个物种。该文对素功膜叶铁角蕨的形态特征进行了详细描述,并提供了线描图和生态照片,凭证标本保存于上海辰山植物标本馆(CSH)和广西植物研究所标本馆(IBK)。展开更多
Palynology of six fern species belonging to the family Aspleniaceae from Saudi Arabia are investigated by light microscope (LM). These are: Asplenium aethiopicum, Asplenium trichomanes, Asplenium adiantum-nigrum, Aspl...Palynology of six fern species belonging to the family Aspleniaceae from Saudi Arabia are investigated by light microscope (LM). These are: Asplenium aethiopicum, Asplenium trichomanes, Asplenium adiantum-nigrum, Asplenium sp.1, Asplenium sp.2 and Ceterach officinarum. All studied spores are oblate-spheroidal in shape class, with 11 - 50 μm in equatorial diameter and with 12 - 49 μm in polar diameter. Two types of spores are recognized: monolete spores in Asplenium aethiopicum, Asplenium trichomanes, Asplenium adiantum-nigrum, Asplenium sp.2 and trilete spores in Asplenium sp.1 and Ceterach officinarum. The exospore (perine) is homogeneous and apparently double-layered in all the studied spores. The perispore is single or double-layered with a microlacunouse structure. The perispore layers can be distinguished by their different contrast, structure and thickness. The exospore sculpture varies from cristates-ridged (Asplenium aethiopicum), cristates granulate (Asplenium adiantum-nigrum), cristates scabrate (Asplenium trichomanes), regulate-scabrates (Asplenium sp.1 and Ceterach officinarum) to papillate or tuberculate sculpture (Asplenium sp.2). Comparison between the earlier studies of some species from Saudi Arabia is given. General characteristics like spore type, ornamentation and laesurae features as well as the number of exospore layers could be useful for taxonomy of Aspleniaceae.展开更多
文摘Palynology of six fern species belonging to the family Aspleniaceae from Saudi Arabia are investigated by light microscope (LM). These are: Asplenium aethiopicum, Asplenium trichomanes, Asplenium adiantum-nigrum, Asplenium sp.1, Asplenium sp.2 and Ceterach officinarum. All studied spores are oblate-spheroidal in shape class, with 11 - 50 μm in equatorial diameter and with 12 - 49 μm in polar diameter. Two types of spores are recognized: monolete spores in Asplenium aethiopicum, Asplenium trichomanes, Asplenium adiantum-nigrum, Asplenium sp.2 and trilete spores in Asplenium sp.1 and Ceterach officinarum. The exospore (perine) is homogeneous and apparently double-layered in all the studied spores. The perispore is single or double-layered with a microlacunouse structure. The perispore layers can be distinguished by their different contrast, structure and thickness. The exospore sculpture varies from cristates-ridged (Asplenium aethiopicum), cristates granulate (Asplenium adiantum-nigrum), cristates scabrate (Asplenium trichomanes), regulate-scabrates (Asplenium sp.1 and Ceterach officinarum) to papillate or tuberculate sculpture (Asplenium sp.2). Comparison between the earlier studies of some species from Saudi Arabia is given. General characteristics like spore type, ornamentation and laesurae features as well as the number of exospore layers could be useful for taxonomy of Aspleniaceae.
