. What is the classification of Plant Kingdom ? explain all classification of Plant Kingdom with reason.


Best Answer

CLASSIFICATION OF PLANT KINGDOM

Based on the system of classification proposed by A.W. Eichler (1875-78), the plant kingdom is pided into two sub-kingdoms. 

They are I. Cryptogamae, II. Phanerogamae.

I. Cryptogamae

This sub-kingdom is sub-pided into three pisions

A.Thallophyta 

Thallophyta is the most primitive and the largest pision of Cryptogams. The plant body is not differentiated and is known as thallus.

It is classified into Algae and Fungi.

i.Algae

Algae are chlorophyll bearing thalloid, autotrophic and largely aquatic plants. 

Eg. Spirogyra

ii.Fungi

Fungi are achlorophyllous heterotrophic thallophytes.

Eg. Rhizopus

B.Bryophyta

Bryophytes are chlorophyllous, autotrophic, embryophytic and atracheophytic cryptogams. They are amphibians of plant kingdom.

Eg. Funaria 

C.Pteridophyta

Pteridophyta are chlorophyllous, autotrophic embryophytic and tracheophytic cryptogams.Eg. Pteris

II. Phanerogamae

Phanerogams are flower bearing, seed producing tracheophytes. This subkingdom has only one pision Spermatophyta.

Spermatophyta

They are seed plants with or without fruits. Seprmatophyta is classified into two sub-pisions.

i.Gymnospermae

Gymnosperms are phanerogams or spermatophytes without ovary and fruit. 

Eg. Cycas, Pinus, Gentum

ii.Angiospermae

Angiosperms are the flowering plants in which the seeds are enclosed by fruits. They are pided into two classes.

a.Dicotyledons

They have two cotyledons in their seeds. Eg. Bean

b.Monocotyledons

They possess only one cotyledon in their seeds. Eg. Maize

 

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