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Issue: Vol. 640 No. 1: 7 Mar. 2024
Type: Article
Published: 2024-03-07
DOI: 10.11646/phytotaxa.640.1.6
Page range: 57-64
Abstract views: 68
PDF downloaded: 2

Swertia jayantii (Gentianaceae): a new species from North-East India

Botanic Garden Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, Uttar Pradesh 226001, India.
Botanic Garden Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, Uttar Pradesh 226001, India.
checklist Onagraceae Pan-Himalaya taxonomy Eudicots Eudicots

Abstract

Swertia jayantii (Gentianaceae), a new species from Jaintia hills, Meghalaya, India is described here with photographic illustration. The new species is described under Swertia subgenus Ophelia sect. Ophelia due to the presence of single, naked nectary on each corolla lobe. It closely resembles S. cordata in having corolla lobes with blue-purple veins and quadrangular, narrowly winged stem. However, it can be distinguished by its deltoid-shaped nectary, calyx lobes shorter than corolla lobes, and obtuse leaf base. A taxonomic description showing detailed morphological characters with a key to the closely related species is provided here to facilitate its proper identification.

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