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 [...]
In this article we will discuss about the classification of bryopsida. In such a vast group, naturally, there are many variations so that classification is difficult. Structures of both gametophytes and sporophytes have to be considered and in mosses these two phases have attained specialisation in different degrees in the different species. Thus, it is not possible to arrive at [...]