Two new scapigerous species of Impatiens (Balsaminaceae) from southern Western Ghats, India

Mohan VISHNU ； Divya K. VENUGOPAL ； Dani FRANCIS ； Santhosh NAMPY

《TAIWANIA》 65卷2期 (2020/06) Pp. 187-194

https://doi.org/10.6165/tai.2020.65.187

摘要

Two scapigerous species of Impatiens (Balsaminaceae): I. nidholapathra and I. grandispora from Idukki district in Kerala, India are here described. Impatiens nidholapathra is most similar to I. tirunelvelica from which it differs by its membranous and silky lanuginose leaves. Impatiens grandispora is related to I. stolonifera morphologically but differs mostly by the purplish white flowers with red patches of papillae near the centre and considerably larger pollen grains. They are known from a small, fragmented population from a low range of hills. Therefore, under the IUCN Red List Categories & Criteria, they are assessed as Critically Endangered. We provide here morphological descriptions, illustrations, colour photoplates, notes on their habitats, distribution, phenology and conservation status.

關鍵字

Idukki district ； Impatiens grandispora ； I. nidholapathra ； I. stolonifera ； I. tirunelvelica ； India ； new species

參考文獻

Yu, S-X., S.B. Janssens, X-Y. Zhu, M. Liden, T-G. Gao and W. Wang 2016. Phylogeny of Impatiens (Balsaminaceae): Integrating molecular and morphological evidences into a new classification. Cladistics 32(2): 179–197.

Bhaskar, V. 2012. Taxonomic monograph on Impatiens L. (Balsaminaceae) of Western Ghats, South India. The key genus for endemism. Centre for Plant Taxonomic Studies, Bangalore, India.

Grey-Wilson, C. 1980. Impatiens of Africa: Morphology, pollination and pollinators, ecology, phytogeography, hybridization, keys and a systematic treatment of all African species with a note on collecting and cultivation. A.A. Balkema Publishers, P.O. Box 1675, Rotterdam, Netherlands.

IUCN 2012. IUCN Red List Categories and Criteria: Version 3.1, Edition. 2. IUCN, Gland Switzerland.

IUCN 2017. Guidelines for using the IUCN Red list Categories and Criteria. Version 13. Prepared by the Standards and Petitions Subcommittee of the IUCN Species Survival Commission (assessed 15th November 2019).