Dioscorea scortechinii Prain & Burkill, a new record for Thailand and its infraspecific variation

Authors

  • Chirdsak Thapyai Department of Biology, Faculty of Science, Naresuan University
  • Paul Wilkin Royal Botanic Gardens, Kew
  • Kongkanda Chayamarit The Forest Herbarium (BKF), National Park, Wildlife and Plant Conservation Department

Keywords:

Dioscorea scortechinii Prain & Burkill, new record

Abstract

Dioscorea scortechinii Prain & Burkill is a compound-leafed species with significant infraspecific variation in floral organ size and shape across its broad, but scattered distribution in
South-East Asia. Previous classifications included a distinct variety (var. parviflora Prain & Burkill) at the northern end of its range in China and Vietnam. Its discovery in Thailand has allowed the distribution of the species as a whole to be clarified. The specimens available from China and Vietnam have tepals which are at the smaller end of a continuous range of size variation and thus the variety does not appear
to merit recognition. A full description, illustrations and a provisional conservation assessment are given. The relationships of D. scortechinii with the mainly Philippine taxa of D. sect. Botryosicyos (Hochst.) Uline with capsules greater than 25 mm long which do not fully reflex, and which often have
thicker leaves with very prominent veins on the lower surface, are suggested to be in need of detailed systematic study.

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Author Biographies

Chirdsak Thapyai, Department of Biology, Faculty of Science, Naresuan University

Department of Biology, Faculty of Science, Naresuan University, Phitsanulok, Thailand.

Paul Wilkin, Royal Botanic Gardens, Kew

Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB,UK.

Kongkanda Chayamarit, The Forest Herbarium (BKF), National Park, Wildlife and Plant Conservation Department

The Forest Herbarium (BKF), National Park, Wildlife and Plant Conservation Department, 61 Phahonyothin Rd., Chatuchak, Bangkok 10900, Thailand.

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How to Cite

Thapyai, C., Wilkin, P., & Chayamarit, K. (2014). Dioscorea scortechinii Prain & Burkill, a new record for Thailand and its infraspecific variation. Thai Forest Bulletin (Botany), (33), 206–212. Retrieved from https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24318

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