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 […]
Reproduction in Riccia (With Diagram) | Bryophytes | Botany
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Diagram of Psilophytales | Pteridophytes | Botany
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An earliest record of vascular plants is from Devonian of Canada (Gaspe Peninsula, Quebec). Although the compressions were fragmentary, a reconstruction revealed slender axes arising from a subterranean rhizome system (Fig. 7.3A). The rhizome lacked roots but had rhizoids. The aerial axes were dichotomously branched with scale-like appendages and terminated into sporangia. Because of its […]
Anatomy of Psilotum (With Diagram) | Pteridophytes | Botany
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In this article we will discuss about the anatomy of psilotum with the help of a suitable diagram. Growth of rhizome and aerial branches takes place by divisions of a single apical cell. During dichotomy it divides equally, forming two apical cells which result in two meristems. Internal structure of rhizome varies with its diameter. […]