Abstract
Impatiens minae Ratheesh, Anil Kumar & Sivad. a new scapigerous species of Impatiens from Wayanad district in Kerala, India is described and illustrated. The new species resembles Impatiens denisonii and I. scapiflora by its 3-lobed lateral united petals and lower sepal with a long spur; but differs from the latter in having a curved band of dense fleshy clavate papillae at the base of lateral united petals, and from the former in the absence of a dorsal filiform appendage or auricle at the base of the lateral united petals.Keywords: Balsaminaceae; Impatiens minae; Western Ghats; India; Scapigerous species.DOI: http://dx.doi.org/10.3329/bjpt.v18i2.9299Bangladesh J. Plant Taxon.18(2): 141-148, 2011 (December)
Highlights
The genus Impatiens L. (Balsaminaceae) is one of the largest and difficult genera of angiosperms comprising over 1000 species (Mabberley, 2008), and several new species are being recognized and described each year
In India the genus is represented by over 203 taxa mainly distributed in three major centres of diversity, i.e. Western Himalayas, North East India and the Western Ghats, each characterized by its own species groups and sections (Hooker, 1910; Gamble, 1915; Rajalal et al, 1996; Vivekananthan et al, 1997)
The scapigerous species of Impatiens have very restricted distribution in South Indian-Sri Lankan region with very low diversity and high rate of endemism compared to non-scapigerous species (Grey-Wilson, 1980; Nair, 1991; Vivekananthan et al, 1997)
Summary
The genus Impatiens L. (Balsaminaceae) is one of the largest and difficult genera of angiosperms comprising over 1000 species (Mabberley, 2008), and several new species are being recognized and described each year. In India the genus is represented by over 203 taxa mainly distributed in three major centres of diversity, i.e. Western Himalayas, North East India and the Western Ghats, each characterized by its own species groups and sections (Hooker, 1910; Gamble, 1915; Rajalal et al, 1996; Vivekananthan et al, 1997). Vivekananthan et al (1977) reported 19 species of scapigerous Impatiens from Western Ghats in his treatment for the flora of India, and the major centre of distribution is considered to be Nilgiri phytogeographical region of southern Western Ghats
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