In this article we will discuss about:- 1. Salient Features of Psilotum 2. Reproduction in Psilotum 3. Phylogeny. Salient Features of Psilotum: i. The sporophytes are dichotomously branched with an underground rhizome and upright branches. ii. The upright branches are leafless. iii. Rhizoids present instead of roots. iv. Stem have a relatively simple vascular cylinder. v. The sporangia are borne [...]
In this article we will discuss about the structure of Pogonatum with the help of diagrams. External Features of Pogonatum: The gametophyte is perrenial, differentiates into a rhizomatous basal portion and aerial upright shoots (Fig. 6.54A). The basal portion bears numerous rhizoids. The rhizoids are multicellular, elongated, thick-walled with oblique septa and are twisted together in a rope-like manner to [...]
In this article we will discuss about the vegetative and sexual modes of reproduction in lycopodium with the help of diagrams. Vegetative Reproduction: Vegetative means of propagation is quite common in the sporophyte of Lycopodium which take place by the following methods: (i) By the Formation of Gemmae or Bulbils: These are modified lateral branches which develop on the stem [...]