Botany
Chapter 2
Plant kingdom
Points To Remember:
CLASSIFICATION:
Artificial System of Classification:
Used superficial morphological characters.
● Based on a few characteristics like habit, colors, number and shape of leaf.
● Mainly based on vegetative characters.
● Such system developed by Linnaeus.
Natural System of Classification:
Based on natural affinities among organisms
Included external as well as internal features like anatomy, embryology and phytochemistry.
Developed by George Bentham and J. D. Houker
Phylogenetic System of Classification:
Based on evolutionary relationships between the various organisms.,Organism belongs to same
taxa have common ancestors. Developed by Hutchinson
Numerical Taxonomy :
Carried out using computer.Based on all observable characteristics.Data processed after
assigning number and codes to all the characters.
Cytotaxonomy:
Based on cytological information.Gives importance to chromosome number, structure and
behaviour.
Chemotaxonomy:
Based on chemical constituents of the plants.
ALGAE:
Chapter 2
Plant kingdom
Points To Remember:
CLASSIFICATION:
Artificial System of Classification:
Used superficial morphological characters.
● Based on a few characteristics like habit, colors, number and shape of leaf.
● Mainly based on vegetative characters.
● Such system developed by Linnaeus.
Natural System of Classification:
Based on natural affinities among organisms
Included external as well as internal features like anatomy, embryology and phytochemistry.
Developed by George Bentham and J. D. Houker
Phylogenetic System of Classification:
Based on evolutionary relationships between the various organisms.,Organism belongs to same
taxa have common ancestors. Developed by Hutchinson
Numerical Taxonomy :
Carried out using computer.Based on all observable characteristics.Data processed after
assigning number and codes to all the characters.
Cytotaxonomy:
Based on cytological information.Gives importance to chromosome number, structure and
behaviour.
Chemotaxonomy:
Based on chemical constituents of the plants.
ALGAE:
