It is one of the primitive vascular plant that is club of mosses and their living fossil. These plant species are group in 6 genera.
Huperzia, Lycopodium, Lycopodiella, Selaginella( spike moss) are some of the genera of this phylum.
This phylum has more than 1200 species of the plants which is is widely distributed in the tropics. These plants depends on the mycorrhizae for obtaining nutrition as they lack the ability of photosynthesis.
The seedless vascular plants or the pteridophyte forms one phylum of the plant kingdom. The pteridophyte kingdom can be classified into three groups: the Sphenophytes, the pteridophytes and the Lycophytes.
The Lycophyte group contains about 1000 living species as it is the most primitive group of vascular plants.
The species is characterised by the presence of the microphyll like the Selaginella and Lycopodium.
The rhizoids of the gametophyte of these plants form the mycorrhizal association with the fungi.
A nucleotide consists of all of the following except a nitrogenous base. The are of course the main building blocks of genetic information in many life forms.
