The shoots in Selaginella are characterized by the possession of meristems (dorsal and ventral) at each branching. These angle-meristems produce roots. In contemporary literature these outgrowths are designated as ‘rhizophore’. However, studies of auxin transport in these structures have conclusively proved their nature as root. Employing labelled auxin (C IAA), it is shown that auxin […]
Control of Root and Shoot in Selaginella | Pteridophytes | Botany
Article shared by : 
Origin of Seed in Selaginella | Pteridophytes | Botany
Article shared by :
In this article we will discuss about the origin of seed in selaginella. An evolutionary sequence of origin of seed from homosporous form should involve: (a) Production of two kinds of spores, (b) Reduction in the number of functional megaspores, (c) Final reduction to a single megaspore in the sporangium, (d) Retention of megaspore within […]
Morphology of Equisetum (With Diagram) | Pteridophytes | Botany
Article shared by :
In this article we will discuss about the morphology of equisetum with the help of a suitable diagram. Equisetum, with some 15 or more species, is distributed all over the world except in Australia and New Zealand. It is commonly known as ‘horse-tail’ or ‘scouring rushes’. The most conspicuous features of the plant are jointed […]