In this article we will discuss about the anatomy of selaginella with the help of a suitable diagram. Apical growth takes place by a single cell and its derivatives or by an apical meristem, comprising a group of cells. Branching occurs by a bifurcation of shoot apex into two apices, one of which overtops the other resulting in anistomous branching. [...]
In this article we will discuss about the morphology of selaginella with the help of diagrams. Selaginella with about 700 species is worldwide (tropics to subarctic) in distribution. It is abundant in tropics, with a wide range in growth habits and habitats. Many species are flat creepers (Fig. 8.1 A) on the ground (S. kraussiana). In some species the plants [...]
The production of two kinds of spores differing in structure and function, the smaller one producing the male gametophyte and larger one producing the female gametophyte, is termed heterospory. For the first time distinct heterospory (structural as well as functional) is evident in pteridophytes; but out of several hundred forms in the group, only 9 genera (Selaginella, Isoetes, Stylites, Marsilea, [...]