In this article we will discuss about:- 1. Habit of Marsilea 2. Structure of Marsilea 3. Reproduction. Habit of Marsilea: The plants are herbaceous with rhizomatous stem, creeping on or just below the soil surface. The species of Marsilea are generally aquatic or amphibious in nature with their roots embedded in mud or damp soil. The aquatic species — M. [...]
In this article we will discuss about the structure and reproduction in Ophioglossum. Structure of Ophioglossum: Sporophyte: The sporophyte is differentiated into a subterranean rhizome with roots and spirally arranged leaves bearing sporangiferous spike (Fig. 7.92A). Stem: The stem is represented by a short, erect, subterranean rhizome. But in epiphytic species, it is horizontal and dorsiventral structure. The upper surface [...]
In this article we will discuss about:- 1. Habit and Habitat of Selaginella 2. Salient Features of Selaginella 3. Structure 4. Reproduction. Habit and Habitat of Selaginella: Selaginella shows considerable variation in size, symmetry and morphology. Mostly they are herbaceous perennials, however, a few are annuals (Selaginella pygmaea). Majority are dorsiventral, prostrate and creeping (Fig. 7.45) on the surface (e.g., [...]