diversity in living organisms-kingdom plantae-pteridophyta

Kingdom Plantae-Pteridophyta

Diversity in living organisms

By : Preksha and Ramla

Criteria for kingdom plantae

•Cell type : Eukaryotes.•Cell number:multicellular•Cell structure :cell wall made of cellulose•Mode of nutrition: autotrophic•Some are parasitic or saprobes

Pteridophyta

a division of flowerless green plants that

comprises the ferns and their relatives.

Examples include ferns, horsetails and

club-mosses.

Many ferns from tropical rain forests are epiphytes,

which means they only grow on other plant

species.

Fronds is the largest species of ferns it can reach some six metres

in length!

WHAT IS CRYPTOGAMAE?

A cryptogam (scientific name Cryptogamae) is a plant

that reproduces by spores, without flowers or seeds.

TYPES OF PTERIDOPHYTES

Pteridophytes have mainly been divided into 3 Classes.• Lycopodophyta (club mosses)• Sphenophyta (horse tails)• Filicinophyta (ferns)

CLUB MOSSES• The plants are mainly native to tropical mountains but also common in northern forests of both hemispheres.

• Club mosses are evergreen herbs with needlelike or

scale like leaves and, often, cone like clusters of small

leaves (strobili), each with a kidney-shaped spore capsule

at its base.• They do not have seeds.

HORSE TAIL• The plants grow in wetlands and marshy, wet areas

at the edge of swamps, ponds and lakes.• Horsetails are vascular plants that reproduce by

spores, not seeds, and by spreading underground stems called Rhizomes.

• The common field horsetail is a perennial that grows up to 2 feet tall.

FERN• Ferns are vascular plants.

• They have roots and leaves (called fronds) and in some cases they have true stems.

• Ferns can be deciduous or evergreen. • In tropical regions, tree ferns may reach a height of

80 feet.

Examples of Pteridophytes

marsilea fern

horsetails

Psilotum