In this article we will discuss about the sexual and asexual modes of reproduction in riccia with the help of diagrams. Sexual Reproduction in Riccia: Most of the species of Riccia are monoecious. Antheridia and archegonia occur on the same thallus. However, some species (R. curtisii and R. discolor) are dioecious. In R. curtisii two spores of a tetrad develop [...]
In this article we will discuss about the morphology of riccia with the help of diagrams. Riccia a cosmopolitan genus with over 200 species, all species are terrestrial (Fig. 2.1 A) except for Riccia fluitans which is free-floating or submerged aquatic. This species is also capable of growing on land (Fig. 2. 1 B). In India, there are about 30 [...]
In this article we will discuss about the anatomy of riccia with the help of a suitable diagram. Internally, as revealed in a cross section, the thallus shows two distinct zones (Fig. 2.2C, D); an upper assimilatory zone and lower storage zone. The chlorophyllous cells of assimilatory zone reveal two types of tissue organizations. In a more common type of [...]