In this article we will discuss about the vegetative and sexual modes of reproduction in Riccia. Vegetative Reproduction: Vegetative Reproduction of Riccia takes place by the following methods: (a) By Progressive Death and Decay of the Older Parts of the Thallus (Fragmentation): Vegetative propagation is taking place usually by the continuous growth from the growing point. The older basal parts [...]
In this article we will discuss about the structure of Porella with the help of diagrams. External Structure of Porella: The gametophyte of Porella is flat, dorsiventral and foliose (Fig. 6.21 A). The prostrate stem or axis is bi- or tripinnately branched. There are three rows of leaves arranged on the stem, two dorsal rows and one ventral row. The [...]
In this article we will discuss about the structure of Riccia with the help of diagrams. External Structures of Riccia: The gametophytic plant body of Riccia is a dichotomously branched dorsiventral prostrate thallus. In terrestrial habits, the plants usually occur in a rosette form due to the presence of a number of dichotomies that grow together from one place (Fig. [...]