Nelumbo - The Bulletin of the Botanical Survey of India

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A Conspectus of the 74 Taxa of Cotoneaster Ehrhart Ex Medic. (Rosaceae) in India


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1 Botanical Survey of India, Howrah, India
 

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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  • A Conspectus of the 74 Taxa of Cotoneaster Ehrhart Ex Medic. (Rosaceae) in India

Abstract Views: 237  |  PDF Views: 122

Authors

G. Panigrahi
Botanical Survey of India, Howrah, India
Arvind Kumar
Botanical Survey of India, Howrah, India

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.