Question

write a paragraph on ornamental plants of fern.

Answer 1

Stems: Fern stems are often referred to as "rhizomes", even though they grow underground only in some of the species. Epiphytic species and many of the terrestrial ones have above-ground creeping stolons (e.g., Polypodiaceae), and many groups have above-ground erect semi-woody trunks (e.g., Cyatheaceae). These can reach up to 20 meters (66 ft) tall in a few species (e.g., Cyathea brownii oThe gametophytes of ferns, however, are very different from those of seed plants: they resemble liverworts. A fern gametophyte typically consists of:Prothallus: A green, photosynthetic structure that is one cell thick, usually heart or kidney shaped, 3–10 mm long and 2–8 mm broad. The prothallus produces gametes by means of:Antheridia: Small spherical structures that produce flagellate sperm.Archegonia: A flask-shaped structure that produces a single egg at the bottom, reached by the sperm by swimming down the neck.Rhizoids: root-like structures (not true roots) that consist of single greatly elongated cells, water and mineral salts are absorbed over the whole structure. Rhizoids anchor the prothallus to the soil