In this article we will discuss about:- 1. Occurrence and Distribution of Lycopodium 2. Sporophyte of Lycopodium 3. Gametophyte 4. Phylogeny. Occurrence and Distribution of Lycopodium: Lycopodium is popularly called the club moss. Among the genera of the family it enjoys widest distribution though its preference is to tropical and sub-tropical forests. It is not uncommon to find Lycopodium growing [...]
In this article we will discuss about the external features and internal structure of calamites. External Features of Calamites: The calamitean fossils range from pith casts, stems, twigs and leaves to strobili. The stem is known as Calamities, leafy twigs are called An nularia, and fructification is known as Calamostachys. The plant body of Calamites was a tall tree (Fig. [...]
After reading this article we will learn about:- 1. Sporophyte of Azolla 2. Gametophyte of Azolla 3. Phylogeny. Sporophyte of Azolla: The sporophyte is extremely small when compared with Marsilea and Salvinia. It is distinguishable into stem, leaves and roots. The stem is often called the rhizome. It is profusely branched and on its upper surface is covered with dense [...]