Merits and demerits of engler and prantl system of classification
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Merits and Demerits of Engler’s System of Classification of Flowering Plants.
Merits:
i. This system of classification is a development over Eichler in many respects.
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ii. Gymnosperms kept under separate sub-division.
iii. It is natural system since its was proposed subsequent to the acceptance of theory of descent.
iv. The large artificial group of Bentham and Hooke’s system Monochlamydaceae has been completely abolished.
v. Compositae and Orchidaceae treated as most advanced families of dicot and monocots respectively.
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Demerits:
i. Monocot treated primitive than dicot.
ii. Amentiferae and Centrospermae placed at the beginning of Ranales.
iii. Helobae is placed in between Pandanales and Glumiflorae.
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iv. Derivation of bi-sexual flower from unisexual.
v. Parietal placenta is advanced over axile.
Merits and demerits of Engler and Prantl system of classification:
Merits:
- Gymnosperm are placed in a separate sub-division.
- It gives modern taxonomic keys for plants identification.
- It includes all kinds of plants.
- The position of Asteraceae as last Dicot family is logical and gymnosperms before Angiosperms is accurate.
- The position of Orchidaceae which is the highest evolved family of monocots as the ending family of Monocot is also reasonable and logical.
Demerits:
- Monocot treated as primitive than dicot.
- Derivation of bi-sexual flower from unisexual.
- Primitive flower concepts are against to modern evolution.
- Amalgamation of Apetalous families with Polypetalous families results in the formation of large groups.
- No practical utility is there.
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