The Protoleptosporangidae or the Osmundidae comprising of the single order Osmundales with the single family Osmundaceae is taken out of the Leptosporangiates as proposed by Hirmer (1927) as it is not truly leptosporangiate. The Osmundales is a very ancient order represented by Thamnopteris and Zalesskya from late Permian and by Osmundites itself from Jurassic onwards. The climax of the group [...]
The following points highlight the four families under which marattidae has been classified. The families are:- 1. Angiopteridaceae 2. Marattiaceae 3. Christenseniaceae 4. Danaeaceae. Family # 1. Angiopteridaceae: Sporangia almost free, arranged in two rows on two sides of vein forming linear sori near margin. Genera: Angiopteris (100 spp. from Polynesia to Madagascar and the Himalayas), Archangiopteris (4 spp. from [...]
The below mentioned article provides a note on the noeggerathiopsida. The class Noeggerathiopsida or the Noeggerathiales form a group of plants extremely peculiar and not yet fully known. Their affinities are rather uncertain. They have been placed within the Sphenopsida, within the Filicopsida and also between the Lycopsida and the Sphenopsida. But, the more general opinion is to consider them [...]