In this article we will discuss about the merits and demerits of Throne’s system. Merits of Thorne's System: 1. The woody Annonales which are now universally accepted as the most primitive living Angiosperms are the starting point of his system and constitute the base of the phylogenetic shrub of Angiosperms. The Berberidaceae and the Nymphaeales, though more advanced than the [...]
In this article we will discuss about the merits and demerits of Bentham and Hooker's system. Merits of Bentham and Hooker's System: 1. The description of families and genera is very accurate. 2. The system is very handy for identification purposes. 3. The system is of great practical convenience. The British and Commonwealth herbaria therefore still adopt this system in [...]
The following points highlight the thirty-six important Swingle’s principles for plant classification. Swingle’s Principle # 1. Plant relationships are up and down genetic lines and these must constitute the framework of phylogenetic taxonomy. Swingle’s Principle # 2. Some evolutionary processes are progressive while others are regressive. Swingle’s Principle # 3. Evolution does not necessarily involve all organs of the plant [...]