Rehderodendron truongsonense (Styracaceae), a new species from Vietnam

  • Wan-Yi Zhao State Key Laboratory of Biocontrol and Guangdong, Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University
  • Peter W. Fritsch Botanical Research Institute of Texas
  • Van Truong Do Department of Biology, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology
  • Qiang Fan State Key Laboratory of Biocontrol and Guangdong, Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University
  • Qian-Yi Yin State Key Laboratory of Biocontrol and Guangdong, Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University
  • Darin S. Penneys Department of Biology and Marine Biology, University of North Carolina Wilmington
  • Ulf Swenson Department of Botany, Swedish Museum of Natural History
  • Wen-Bo Liao State Key Laboratory of Biocontrol and Guangdong, Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University

Abstract

Rehderodendron truongsonense, a new species from Vietnam, is described and illustrated. In the treatment of the Styracaceae for the Flore du Cambodge, du Laos, et du Viêtnam, specimens of this species were recognized as R. macrocarpum Hu. These specimens clearly differ from R. macrocarpum, however, as well as from all other species of Rehderodendron (where these characters are known) by, e.g., an evergreen versus deciduous habit, fewer secondary veins of the leaf blade, shorter inflorescences and corolla lobes, large and conspicuous lowermost bracteoles, the presence of eight ovules per carpel, and a fruit with ca. 10 to 20 ribs that are indistinct. Phylogenetic analysis based on five chloroplast DNA regions (clpP-psbB, ndhD-psaC-ndhE-ndhG, rpl22-rps19, rps18-rpl20, and psbI-trnS-GCU) placed the new species as nested within Rehderodendron and sister to R. gongshanense. This new species is endemic to the Truong Son Mountain Range, from which the epithet is derived, and we assign it an IUCN Red List preliminary status as Near Threatened.

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Published
2019-07-23
How to Cite
Zhao, W.-Y., Fritsch, P. W., Truong Do, V., Fan, Q., Yin, Q.-Y., Penneys, D. S., Swenson, U., & Liao, W.-B. (2019). Rehderodendron truongsonense (Styracaceae), a new species from Vietnam. Journal of the Botanical Research Institute of Texas, 13(1), 157-171. Retrieved from https://journals.brit.org/jbrit/article/view/837

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