TY - JOUR AU - Zhao, Wan-Yi AU - Fritsch, Peter W. AU - Truong Do, Van AU - Fan, Qiang AU - Yin, Qian-Yi AU - Penneys, Darin S. AU - Swenson, Ulf AU - Liao, Wen-Bo PY - 2019/07/23 Y2 - 2024/03/28 TI - Rehderodendron truongsonense (Styracaceae), a new species from Vietnam JF - Journal of the Botanical Research Institute of Texas JA - J. Bot. Res. Inst. Texas VL - 13 IS - 1 SE - SYSTEMATICS DO - 10.17348/jbrit.v13.i1.837 UR - https://journals.brit.org/jbrit/article/view/837 SP - 157-171 AB - <p><em>Rehderodendron</em> <em>truongsonense</em>, a new species from Vietnam, is described and illustrated. In the treatment of the Styracaceae for the Flore&nbsp;du Cambodge, du Laos, et du Viêtnam, specimens of this species were recognized as <em>R. macrocarpum</em> Hu. These specimens clearly differ from&nbsp;<em>R. macrocarpum</em>, however, as well as from all other species of <em>Rehderodendron</em> (where these characters are known) by, e.g., an evergreen versus&nbsp;deciduous habit, fewer secondary veins of the leaf blade, shorter inflorescences and corolla lobes, large and conspicuous lowermost&nbsp;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&nbsp;chloroplast DNA regions (clpP-psbB, ndhD-psaC-ndhE-ndhG, rpl22-rps19, rps18-rpl20, and psbI-trnS-GCU) placed the new species as nested&nbsp;within <em>Rehderodendron</em> and sister to <em>R. gongshanense</em>. This new species is endemic to the Truong Son Mountain Range, from which the epithet&nbsp;is derived, and we assign it an IUCN Red List preliminary status as Near Threatened.</p> ER -