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 of Calamites 2. Sub-Genera of Calamites 3. Structure. Habit of Calamites: The name Catamites was first proposed by Suckow (1784) and later in 1828, Brongniart established its relationship with Equisetum. Catamites was a tall tree that attained a height of about 33 ft (10 m). The plant had a stout underground [...]
In this article we will discuss about:- 1. Habit and Habitat of Equisetum 2. Structure of Equisetum 3. Reproduction 4. Life Cycle. Habit and Habitat of Equisetum: The plant body of Equisetum has an aerial part and an underground rhizome part (Fig. 7.83). The rhizome is perennial, horizontal, branched and creeping in nature. The aerial part is herbaceous and usually [...]