Pteridophyte Bryophyta Gymnosperm General Characteristics Examples
PTERIDOPHYTE Definition : Seedless vascular cryptogams where the sporophytic plant body is differentiated into true root, stem and leaves are called pteridophytes. General Characteristics : 1. Plant body is sporophyte which is differentiated into true stem, leaves and roots. 2 They occur in a variety of habitats. Mostly they are terrestrial plants and grow well in abundant moisture and shaded localities. A few are aquatic, some others are epiphytic. 3. Primary roots are short-lived and are soon replaced by adventitious roots. 4. The stem is rhizomatous, branching is dichotomous or monopodial in some cases. 5. Leaves are of two types-microphyllous and megaphyllous. Microphyllous leaves are simple, small and have a single central vein not associated with leaf gap (e.g., Lycopodium, Selaginella). Megaphyllous leaves are compound, large-sized associated with leaf gap and are supplied with vascular bundles (e.g., Pteris). A. Adiantum . B. Dryopteris . C.Spor...