Abstract
An examination of herbarium specimens and type material shows Reevesia orbicularifolia is conspecific with R. orbicularis, which is distributed in Vietnam. Therefore, R. orbicularifolia is reduced as a synonymy of R. orbicularis. A new species R. napoensis from northwestern Guangxi, China is described and illustrated. The new species is similar to R. rotundifolia and R. orbicularis but differs in having 7-veined cordate leaf blades, three bracts, 4-lobed sepals, and glabrous petals.
References
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<p>Thorne, R.E. (1992) Classification and geography of the flowering plants. <em>Botanical Review</em> 58: 225–348. https://doi.org/10.1007/BF02858611</p>
<p>Von Balthazar, M., Schonenberger, J., Alverson, W.S., Janka, H., Bayer, C. & Baum, D.A. (2006) Structure and evolution of the androecium in the Malvatheca clade (Malvaceae s.l.) and implications for Malvaceae and Malvales. <em>Plant Systematics Evolution</em> 260: 171–197. https://doi.org/10.1007/s00606-006-0442-9</p>
<p>Wu, Z.Y. (1979) <em>Reevesia</em> Lindl. <em>In:</em> <em>Flora of Yunnan 2</em>. Science Press, Beijing. pp. 153–158.</p>
<p>Chun, W.Y. (1934) Flora of Kwangtung. <em>Sunyatsenia</em> 1: 269–230.</p>
<p>Clemens, B., Michael, F.F., Anette, Y.D.B., Vincent, S., Cynthiam, M.M., Klaus, K., William, S.A.& Mark, W.C. (1999) Support for an expanded family concept of Malvaceae within a recircumscribed order Malvales: a combined analysis of plastid <em>atpB</em> and <em>rbcL</em> DNA sequences. <em>Botanical Journal of Linnean Society</em> 129: 267–303. https://doi.org/10.1111/j.1095-8339.1999.tb00505.x</p>
<p>Hsue, H.H. (1974) <em>Reevesia</em> Lindl.<em> In: </em>Yu, T.T. (Ed.) <em>Flora Reipublicae Popularis Sinicae</em>, vol. 49 (2). Science Press, Beijing, pp. 144–152.</p>
<p>Hsue, H.H. (1977) Review of the Sterculiaceous Plants in China. <em>Acta Phytotaxonomica Sinica</em> 15 (1): 81–82.</p>
<p>IUCN (2022) <em>Guidelines for Using the IUCN Red List Categories and Criteria, Version 15</em>. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 9 February 2022)</p>
<p>Judd, W.S. & Manchester, S.R. (1997) Circumscription of Malvaceae (Malvales) as Determined by a Preliminary Cladistic Analysis of Morphological, Anatomical, Palynological, and Chemical Characters.<em> Brittonia</em> 49: 384–405. https://doi.org/10.2307/2807839</p>
<p>Lê, T.C. (2003) <em>Reevesia</em> Lindl. <em>In:</em> <em>Cay co Viet Nam:</em> <em>An Illustrated Flora of Vietnam vol 1</em>. Mekong Printing, Montreal. pp. 503–504.</p>
<p>Lindley, J. & Reeves, J.E. (1827) Account of a New Genus of Plants, called <em>Reevesia</em>. <em>Quarterly Journal of Science, Literature and the Arts</em> 2 (2): 109–112.</p>
<p>Masters, M.T. (1874) XXVII. Sterculiaceae.<em> In: </em>Hooker, J.D. (ed.) <em>Flora of British India</em> 1 (2). pp. 353–379.</p>
<p>Nyffeler, R., Bayer, C., Alverson, W.S., Yen, A., Whitlock, B., Chase, M.W. & Baum, D.A. (2005) Phylogenetic analysis of the Malvadendrina clade (Malvaceae s.l.) based on plastid DNA sequences. <em>Organisms Diversity & Evolution</em> 5: 109–123. https://doi.org/10.1016/j.ode.2004.08.001</p>
<p>Phengklai, C. (2001) <em>Reevesia </em>Lindl.<em> In: </em>Santisuk, T. & Larsen, K. (eds.)<em> Flora of Thailand 7 (3)</em>. The Forest Herbarium, Royal Forest Department, Bangkok, pp. 618–621.</p>
<p>Tang, Y., Michael, G.G., Laurence, J.D. & Spongberg, S.A. (2007) <em>Reevesia</em> Lindl.<em> In: </em>Wu, Z.Y., Raven, P.H. & Hong, D.Y. (eds.) <em>Flora of China 9</em>. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis, pp. 302–330.</p>
<p>Tardieu, M.L. (1942) Sterculiaceae Nouvelles D<sup>’</sup>Indochine. <em>Notulae systematicae</em> 10: 237.</p>
<p>Tardieu, M.L. (1945) <em>Reevesia</em> Lindl.<em> In: </em>Lecomte, P.H. (Eds.) <em>Flore Générale de l’Indo–Chine</em>. Masson, Paris. 1027 pp.</p>
<p>Takhtajan, A.L. (1997) <em>Diversity and Classification of Flowering Plants</em>. Columbia University Press, New York, 643 pp.</p>
<p>Thorne, R.E. (1992) Classification and geography of the flowering plants. <em>Botanical Review</em> 58: 225–348. https://doi.org/10.1007/BF02858611</p>
<p>Von Balthazar, M., Schonenberger, J., Alverson, W.S., Janka, H., Bayer, C. & Baum, D.A. (2006) Structure and evolution of the androecium in the Malvatheca clade (Malvaceae s.l.) and implications for Malvaceae and Malvales. <em>Plant Systematics Evolution</em> 260: 171–197. https://doi.org/10.1007/s00606-006-0442-9</p>
<p>Wu, Z.Y. (1979) <em>Reevesia</em> Lindl. <em>In:</em> <em>Flora of Yunnan 2</em>. Science Press, Beijing. pp. 153–158.</p>