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Taxonomic status of the Cycas pectinata complex
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Khuraijam JS, Singh R. 2020. Taxonomic status of the Cycas pectinata complex. Cycads 5
(1): 59-76.
Abstract
The Cycas pectinata is a taxonomically complex, confused entity distributed naturally in Northeast India, Bhutan, Bangladesh, Nepal, Southwest China, Myanmar, Thailand and Vietnam. A detailed morphometric analysis of taxonomically distinct vegetative and reproductive structures of Cycas populations in India revealed differences among populations supporting their separation into two species: Cycas pectinata is confined to the western part of the Indo Burma Range (IBR), and to the east of the IBR, a Southeast Asian taxon which is described and illustrated here as a new species, Cycas divyadarshanii. The new species is distinguished from Cycas pectinata by its long narrow microsporophylls and lack of a thickened protrusion on the adaxial surface which is prominent in C. pectinata. Anatomical characters and pollen structure of both the species also differ. The separation of these taxa is also supported by their association with different putative beetle pollinators.
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