- Question Answer
- What is the classification of Plant Kingdom ? explain all classification of Plant Kingdom with reason.
. What is the classification of Plant Kingdom ? explain all classification of Plant Kingdom with reason.
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.
This sub-kingdom is sub-pided into three pisions
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.
Algae are chlorophyll bearing thalloid, autotrophic and largely aquatic plants.
Fungi are achlorophyllous heterotrophic thallophytes.
Bryophytes are chlorophyllous, autotrophic, embryophytic and atracheophytic cryptogams. They are amphibians of plant kingdom.
Pteridophyta are chlorophyllous, autotrophic embryophytic and tracheophytic cryptogams.Eg. Pteris
Phanerogams are flower bearing, seed producing tracheophytes. This subkingdom has only one pision Spermatophyta.
They are seed plants with or without fruits. Seprmatophyta is classified into two sub-pisions.
Gymnosperms are phanerogams or spermatophytes without ovary and fruit.
Eg. Cycas, Pinus, Gentum
Angiosperms are the flowering plants in which the seeds are enclosed by fruits. They are pided into two classes.
They have two cotyledons in their seeds. Eg. Bean
They possess only one cotyledon in their seeds. Eg. Maize