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| Dolichos kongkandae R. Meeboonya, Ngerns. & Balslev in Meeboonya, Ngernsaengsaruay & Balslev, 2021. |
Abstract
Dolichos kongkandae is described as a new species from Asia and includes a line drawing, photographs and information on its distribution and ecology. The morphological differences between D. kongkandae and the morphologically similar D. tenuicaulis are highlighted and clarified. Additionally, a lectotype for D. fragrans is designated.
Keywords: Fabaceae, lectotype, new species discovery, Phaseoleae, Phaseolinae, taxonomy
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| Figure 2. Dolichos kongkandae R. Meeboonya, Ngerns. & Balslev A habit B leaf C inflorescence with flower buds D inflorescence with young and mature flowers E inflorescence with a mature flower and a young fruit F infructescence with a mature fruit. Photographs from R. Meeboonya & P. Yodboplub 406 (BKF). |
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| Figure 1. Dolichos kongkandae R. Meeboonya, Ngerns. & Balslev A stem with leaves, inflorescence and infructescences B calyx C inflorescence with a flower D standard petal E wing petals F keel petals G bracts of fascicle H bracteoles I pistil J stamens K seed. Drawn from R. Meeboonya & P. Yodboplub 406 (BKF) by Rumrada Meeboonya. |
Dolichos kongkandae Meeboonya, Ngerns. & Balslev, sp. nov.
Diagnosis: Dolichos kongkandae is most similar to D. tenuicaulis, but differs in having a densely-pubescent stem (versus slightly pubescent), ovate or broadly elliptic stipules (versus lanceolate, elliptic or subtriangular), a longer axis of inflorescence, 1–3 cm long (versus 0.3–0.5 cm long), the corolla dark purple turning blackish-purple when dried (versus purplish-pink or pale pink turning pale yellow when dried), a larger standard, ca. 12 × ca. 14 mm (versus 8–9 × 8.5–9 mm), wing petals, ca. 16 × ca. 8 mm (versus 10–11 × 3–4 mm), keel petals 11–12 × 3–4 mm (versus 9–10 × 2–2.5 mm) and a hirsute fruit stalk (versus slightly puberulous).
Distribution: Bhutan, India, Myanmar, China, Laos, Thailand.
Ecology: Open areas in montane rain forests, mixed deciduous forests, limestone ridges, 550–2150 m alt.
Vernacular name: Thua doi dok muang kongkanda (ถั่วดอยดอกม่วงก่องกานดา), the name is here given by the authors. This vernacular name references legumes (thua), the hills or mountain regions of its origin (doi), purple corolla (dok muang), and our mentor (Dr. Kongkanda Chayamarit).
Conservation status: Dolichos kongkandae is widely distributed in its habitats. However, these areas are disturbed by the human activities. It is therefore considered as Near Threatened (NT), following the IUCN Red List Criteria and Categories version 14 (IUCN 2019).
Etymology: The specific epithet is named in honour of Dr. Kongkanda Chayamarit, the expert botanist of the Forest Herbarium and the Flora of Thailand Project. She was the former supervisor of Associate Professor Dr. Chatchai Ngernsaengsaruay in his master’s and doctoral degrees and the thesis co-advisor of Dr. Rumrada Meeboonya in her master’s and doctoral degrees. She has always encouraged and supported us.
Rumrada Meeboonya, Chatchai Ngernsaengsaruay and Henrik Balslev. 2021. Dolichos kongkandae sp. nov. and lectotypification of D. fragrans (Leguminosae, Papilionoideae) from Asia. PhytoKeys. 175: 55-65. DOI: 10.3897/phytokeys.175.57759
