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Open Access Curcuma stahlianthoides (Zingiberaceae), a new species from northeastern Thailand dispersed by ants

Curcuma stahlianthoides, a new species of Curcuma subg. Hitcheniopsis (Zingiberaceae: Zingiberoideae) from northeastern Thailand is described and illustrated here. The flower morphology of C. stahlianthoides resembles several other species formerly classified in the genus Stahlianthus, but the inflorescences are composed of up to 11 plain green fertile bracts, conforming to the typical inflorescence structure in the genus Curcuma. This combination of characters is similar to C. leonidii from Vietnam, to which it is compared for the diagnostic purposes. Previous molecular results indicate that Stahlianthus should be merged with Curcuma subg. Hitcheniopsis and C. stahlianthoides is the second species providing morphological justification to do so. A detailed description based on living flowering material, colour plates including the flower dissection, and notes on distribution, habitat and phenology are also provided. The status of Vulnerable is proposed for this species based on the IUCN guidelines and criteria. Observations on ant-aided seed dispersal of this species are reported and discussed within present knowledge of myrmecochory in gingers.

Keywords: ANT-AIDED SEED DISPERSAL; CURCUMA LEONIDII; CURCUMA SUBG. HITCHENIOPSIS; MYRMECOCHORY; STAHLIANTHUS; VULNERABLE

Document Type: Research Article

Affiliations: 1: Department of Agriculture and Resources, Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Chiang Khruea, Mueang Sakon Nakhon, Sakon Nakhon, Thailand 47000 2: Department of Food Technology and Nutrition, Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Chiang Khruea, Mueang Sakon Nakhon, Sakon Nakhon, Thailand 47000 3: 135 Moo 3 Ban Na Wai, Takon, Akat Amnuai, Sakon Nakhon, Thailand 47170 4: Singapore Botanic Gardens, National Parks Board, 1 Cluny Rd., 259569 Singapore

Publication date: June 1, 2022

This article was made available online on June 15, 2022 as a Fast Track article with title: "Curcuma stahlianthoides (Zingiberaceae), a new species from northeastern Thailand dispersed by ants".

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  • Blumea is an international journal on the biodiversity, evolution and biogeography of plants, including topics on systematics, floristics, phylogeny, morphology and anatomy. For floristic studies, the focus is on tropical Africa south of the Sahara, tropical Southeast Asia with a strong emphasis on Malesia, and South America with emphasis on the Guianas. Papers in Blumea are subjected to peer review and are in English. Blumea is published three times a year, comprising c. 300 pages in total.
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