The following points highlight the nineteen essential features of ferns. 1. Ferns are seedless vascular plants of humid tropics and temperate areas. Some ferns live under sub-arctic conditions as well. 2. They constitute the largest living group of primitive vascular plants with over 10,000 species. Ferns once dominated the earth in carboniferous period (about 300 million years ago). 3. Plant [...]
In this article we will discuss about:- 1. Characters of Bryophytes 2. Functions of Bryophytes 3. Economic Importance. Characters of Bryophytes: Bryophytes are nonvascular terrestrial plants of moist habitats in which z multicellular diploid sporophyte lives as a parasite on an independent multicellular haploid. Gametophyte that develops multicellular jacketed sex organs. 1. They have over 25,000 species. 2. Bryophytes live [...]
The following points highlight the three classes of Pteridophytes. The classes are: 1. Psilopsida 2. Lycopsida 3. Sphenopsida. Pteridophytes: Class # 1. Psilopsida (Psilophytes): They are the most primitive vascular plants. Roots are absent. Instead rhizoids occur. Stem is dichotomously branched. It has two parts, aerial and rhizomatous. Aerial stems are green and photosynthetic. Leaves may be present or absent. [...]