In this article we will discuss about the external features of marsilea. 1. Plant body (Fig. 258) is sporophytic and the sporophyte possesses a rhizome; having man) roots arising towards lower side and leaves towards the upper side. 2. Rhizome is long, slender, well-branched and grows on or below the soil surface and may attain a length of several metres [...]
Observe the external features of the plant, and arrangement, types and shape of leaf, ligule, rhizophore and roots. 1. Plant body is sporophytic and the sporophyte is evergreen and perennial. 2. Most of the species are prostrate but Selaginella trachyphylla is sub-erect and S.erythropus is erect (Fig. 208). 3. Size of the sporophyte ranges from few centimetres to several feet [...]
In this article we will discuss about the structure and reproduction in Isoetes with the help of diagrams. Structure of Isoetes: Sporophyte: The plant resembles a monocot garlic plant in particular (Fig. 7.59). Isoetes is commonly called 'Quill wort' due to the quill (a large feather)-like structure of the leaves. The plant body consists of a condensed, lobed corm or [...]