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Issue: Vol. 650 No. 3: 29 May 2024
Type: Article
Published: 2024-05-29
DOI: 10.11646/phytotaxa.650.3.2
Page range: 206-212
Abstract views: 73
PDF downloaded: 82

Impatiens alboarenicola, a new species of Balsaminaceae from north-western Madagascar

Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
Kagoshima University Museum, Kagoshima University, 1-21-30, Korimoto, Kagoshima 890-0065, Japan
Department of Plant Biology and Ecology, Faculty of Science, University of Antananarivo, BP 566, Ambohitsaina, Antananarivo 101, Madagascar
Faculty of Science, Technology and Environment, University of Mahajanga, BP 652, Immeuble Kakal, 5 Rue Georges V, Mahajanga 401, Madagascar
Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan. Graduate School of Advanced Science and Engineering, Hiroshima University, 1-5-1, Kagamiyama, Higashihiroshima 739-8529, Japan.
Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
African flora Ericales seasonally dry tropical forests plant taxonomy Eudicots

Abstract

A new species of Impatiens, I. alboarenicola (Balsaminaceae), is described and illustrated from Ankarafantsika National Park, north-western Madagascar. This species is similar to I. barthlottii and I. tsingycola in leaf and flower shape, but clearly distinguished from the former by its shorter stature, absence of a tuber at the stem base, solitary (rarely 2) flowers in the axils of leaves, and smaller flowers, and from the latter by its smaller leaf blades with fewer pairs of teeth on the dentate leaf margin, solitary (rarely 2) flowers in the axils of leaves, and saccate spur-like projection located at ca. 5 mm below the apex of the lower petal lobe of the lateral united petals (vs. at the apex of the lower petal lobe).

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