Abstract
Available evidence from cytology [X=17 2n=34 (3 ssp.). 2n=51 (3 spp.) and 2n=68 (14 spp.)] judged against the breeding behaviour of the parental species and their F1 hybrids. All suggest that Cotoneaster Ehrhart ex Medic. must be treated as a largely apomictic genus, in which recognition of 'micro-species', sensu Klotz (1957-Seq. 1978), is justified. The distributional data of the 74 taxa indigenous to India brings up 25 species as endemic (asterisked) to the Indian Sector of the Himalayas and one, viz., C. buxifolia Wall. ex. Lindl., to the Nilgiri ill ranges. A conspectus of the 74 species, arranged alphabatically with correct nomenclature typification, relevant synonyms and their occurrence in different Sectors/Zones of India is appended.
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