B

Merits

      1.  It is very simple way of classification

      2.  It is the most pioneer work in plant classification

Demerits

     1. Linnaeus system of classification is purely an artificial one where    

     he tried to arrange  the genera into orders with characters of

     simple symmetry.

    2. Most of the orders and genera of some families are mixed up, e.g., 

      some members of Anacardiaceae and all members of

    Zingiberaceae have been placed in one class Monandria as they

    have only one stamen.

   3. Dicots and monocots were mixed up in some cases, e.g.

   Sarmantaceae includes both Citis (dicot) and Asparagus (monocot).

  4 . Polypetalous orders are mixed up with gamopetalous ones.

Botany.Taxonomy

	Classes	Characters
12.	Icosandria	Stamens 20 or more, attached to the calyx
13.	Polyandria	Stamens 20 or more, attached to the receptacle
14.	Didynamia	Stamens didynamous
15.	Tetradynamia	Stamens tetradynamous
16.	Monadelphia	Stamens united in a bundle
17.	Diadelphia	Stamens united in two bundles
18.	Polyadelphia	Stamens united in more than two bundles
19.	Syngenesia	Stamens united by anthers
20.	Gyandria	Stamens adnate to the carpels
21.	Monoecia	Plants monoecious
22.	Dioecia	Plants dioecious
23.	Polygamia	Plants polygamous
24.	Cryptogamia	Plants with concealed flower

Botany.Taxonomy

	Classes	Characters
1.	Monandria	Stamen 1
2.	Diandria	Stamens 2
3.	Triandria	Stamens 3
4.	Tetrandria	Stamens 4
5.	Pentandria	Stamens 5
6.	Hexandria	Stamens 6
7.	Heptandria	Stamens 7
8.	Octandria	Stamens 8
9.	Enneandria	Stamens 9
10.	Decandria	Stamens 10
11.	Dodecandria	Stamens 11-19

	Classes	Characters
1.	Monandria	Stamen 1
2.	Diandria	Stamens 2
3.	Triandria	Stamens 3
4.	Tetrandria	Stamens 4
5.	Pentandria	Stamens 5
6.	Hexandria	Stamens 6
7.	Heptandria	Stamens 7
8.	Octandria	Stamens 8
9.	Enneandria	Stamens 9
10.	Decandria	Stamens 10
11.	Dodecandria	Stamens 11-19

Phylogenetic system:

 Phylogenetic system:

 Phylogenetic system is based on phylogenetic relationship and concept of evolution of plants. Such as-

Engler and Prantl’s system

Hutchinson’s system

Bessey’s system

Tippo’s system

Cornquist’s system etc.

 Phylogenetic system:

 Phylogenetic system is based on phylogenetic relationship and concept of evolution of plants. Such as-

Engler and Prantl’s system

Hutchinson’s system

Bessey’s system

Tippo’s system

Cornquist’s system etc.

Natural system:

Natural system:

In the natural system all the important characters are taken into consideration and plants are classified according to their resemblances and differences mostly in their important morphological characters. Such as-

Bentham and Hooker’s system

Jussieu’s system

De Candolle’s system etc.