In this article we will discuss about the anatomy of marchantia with the help of a suitable diagram. Internally, in a cross-section (Fig. 2.7A, B) the thallus is made up of two zones; upper assimilatory and lower storage zone. The assimilatory zone is narrow, it is made up of a single layer of air chambers […]
Anatomy of Marchantia (With Diagram) | Bryophytes | Botany
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Reproduction in Psilotum (With Diagram) | Pteridophytes | Botany
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in this article we will discuss about the modes of reproduction in psilotum with the help of diagrams. Stout aerial branches bear large conspicuous sporangia (Fig. 7.1 A). Each sporangium is a 3-lobed structure (Fig. 7. 1B, C). It is borne on a forked appendage. It has been described as: (a) Trilocular sporangium (b) Trisporangiate […]
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 […]