<i>Curcuma sirirugsae</i>, a New Species of the family Zingiberaceae from Northern Thailand

Authors

  • Sarayut Rakarcha Queen Sirikit Botanic Garden, The Botanical Garden Organization, Chiang Mai 50180, Thailand.
  • Piyaporn Saensouk Diversity of Family Zingiberaceae and Vascular Plant for Its Applications Research Unit, Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand. 
  • Charun Maknoi Romklao Botanic Garden, The Botanical Garden Organization, Phitsanulok 65170, Thailand.
  • Woranart Thammarong Queen Sirikit Botanic Garden, The Botanical Garden Organization, Chiang Mai 50180, Thailand.
  • Surapon Saensouk Diversity of Family Zingiberaceae and Vascular Plant for Its Applications Research Unit, Walai Rukhavej Botanical Research Institute, Mahasarakham University, Maha Sarakham 44150, Thailand.

DOI:

https://doi.org/10.26538/tjnpr/v8i4.5

Keywords:

Sukhothai, limestone hills, Curcuma sirirugsae, Curcuma angustifolia

Abstract

The aim of this study was to describe a new species of the genus Curcuma L. (Zingiberaceae) from northern Thailand. It has been named Curcuma sirirugsae Saensouk & Rakarcha and its description, illustrations, and photographs have been provided. The new species belongs to the subgenus Curcuma and is identified by its two downward-facing spurs, presence of coma bracts, closed flower form and epigynous glands. Curcuma sirirugsae is endemic to the Sukhothai Province in northern Thailand. The morphology of C. sirirugsae and C. angustifolia Roxb. are quite similar, but there are distinct differences in the following characteristics: the leaves are broadly elliptic, the fertile bracts are ovate to lanceolate and densely arranged with an acute apex, they are also pubescent. Additionally, the coma bracts are larger, pubescent, and have an acute apex. The lateral staminodes are irregularly oblong to irregularly elliptic, and the anther spur is longer. Details on the description regarding morphological characteristics, including distribution, ecology, phenology, vernacular, etymology and preliminary conservation assessment are provided. It also includes an updated key to the 25 species of the Curcuma subgenus Curcuma recognized in Thailand, as well as an investigation of its closest species.

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Published

2024-05-01

How to Cite

Rakarcha, S., Saensouk, P., Maknoi, C., Thammarong, W., & Saensouk, S. (2024). <i>Curcuma sirirugsae</i>, a New Species of the family Zingiberaceae from Northern Thailand. Tropical Journal of Natural Product Research (TJNPR), 8(4), 6775–6780. https://doi.org/10.26538/tjnpr/v8i4.5

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