(i) | It was given by George Bentham and Joseph Dalton Hooker |
(ii) | It was based on natural affinities among the organisms |
(iii) | It takes into account not only the external features but also internal features |
(iv) | Internal features like ultrastructure, anatomy, embryology and phytochemistry are also considered |
(v) | Evolution is also taken into account |
I: | Sex organs are commonly present |
II: | Plasmogamy is brought about by the fusion of two vegetative or somatic cells of different strains or genotypes |
III: | The dikaryotic structure may give rise to the basidium |
IV: | Karyogamy and Meiosis take place in the basidium producing four ascospores |
V: | The basidiospores are exogenously produced on the basidium |