abida Archive
TYPE I: CYCAS Occurrence Cycas has a limited distribution. It is found in south East Asia and Australia. Cycas is also cultivated as an ornamental plant in the gardens and parks. Cycas plants live upto hundred years or more. Cycas is called a living
DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF PTERIDOPHYTA
GYMNOSPERM Occurrence Gymnosperms are naked seeded plants. Gynmosperms are a group of ancient plants. They become dominant in the Jurassic period Most of the gymnosperms are evergreen trees. Some shrubby pl..flas are also found in this group. They have worldwide distribution. They are most
SEED HABIT A seed consists of an embryo, stored food and a seed coat. The seed habit is the most complex and evolutionary successful method of sexual reproduction. It is found in vascular pIants. Today, seed plants, gymnosperms and angiosperms flowering plants are the
PTEROPSIDA (FERNS) TYPE III POLYPODIUM Occurrence Polypodium is a perennial herb. It is found mostly in temperate regions. It has worldwide distribution. Mostly is attached to some rocks. But some forms are epiphytic. General structure The plant body is sporophyte. Plant body is divided
PTEROPSIDA (FERNS) TYPE II MARSILEA (Water fern) Occurrence Marsilea is an aquatic or semi aquatic plant. It is common in the temperate regions. It groNA in fresh water ponds and ditches in Punjab. Marsilea quadrifolia and Munilea minuta are commonly found in Pakistan. General
IPTEROPSIDA (FERNS) TYPE I ADIANTUM (Maiden Hair Fern) Occurrence Adiantum is a common fern. It is found in the plains of the Punjab. It grows in shady places. It is found on moist walls or rocky places. The common specie of this genus is
SPHENOPSIDAF TYPE EQUISETUNI Occurrence The genus Equisetum has 25 species. It is world wide in distribution. They are most common in temperate regions. It generally grows in moist places. General structure The plant body is sporophyte. It is composed of rhizome, aerial branches, scale
LYCOPSIDA TYPE SELAGINELLA Occurrence Selaginella is a tropical plant. It has world wide distribution. It grows in damp forests. Some species occur in temperate regions. They grow in moist shady places. General structure The plant body is sporophyte. The body is divided into root,
PSILOPSIDA TYPE PSILOTUM Occurrence Psilotum is distributed in tropical and subtropical regions. It may grow as an epiphyte on the bark of trees. It also grows on soil where humus is abundantly available. General structure The plant body is sporophyte. The plant is a
