Wagner Warren L, Krakos Kyra N, Hoch Peter C
Department of Botany, MRC-166, National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington, DC 20013-7012, USA.
Biology Department, Maryville University, 650 Maryville University Dr., St. Louis, MO 63141, USA.
PhytoKeys. 2013 Nov 4(28):61-72. doi: 10.3897/phytokeys.28.6143. eCollection 2013.
The long-recognized genus Gaura was shown recently to be deeply nested within one of two major clades of Oenothera. New molecular data indicate further taxonomic changes are necessary in Oenothera sect. Gaura. We make these changes here, including three new combinations, in advance of the Onagraceae treatment for the Flora of North America. The new phylogenetic studies show that several pairs of taxa treated as subspecies in the most recent revision by Raven and Gregory (1972) had independent origins within sect. Gaura, and are here elevated to species level (Oenothera nealleyi for Gaura suffulta subsp. nealleyi; Oenothera dodgeniana for Gaura neomexicana subsp. neomexicana; and Oenothera podocarpa for Gaura hexandra subsp. gracilis). Also, a nomenclatural problem in Oenothera sect. Calylophus is corrected by adopting the name Oenothera capillifolia Scheele for the species known previously, and nomenclaturally correct, as Calylophus berlandieri Spach. This problem necessitates a new combination Oenothera capillifolia subsp. berlandieri.
长期以来被认可的高代花属最近被证明深深嵌套在月见草属的两个主要分支之一中。新的分子数据表明，月见草属高代花组需要进一步的分类学修订。在《北美植物志》柳叶菜科卷册出版之前，我们在此进行这些修订，包括三个新组合。新的系统发育研究表明，在雷文和格雷戈里（1972年）最近一次修订中被视为亚种的几对分类群在高代花组内有着独立的起源，在此将它们提升到物种水平（高代花尼尔利亚种提升为尼尔利月见草；新墨西哥高代花亚种提升为多杰尼亚月见草；六蕊高代花纤细亚种提升为柄果月见草）。此外，月见草属萼花组中的一个命名问题通过采用谢勒的毛叶月见草来解决，该物种之前被称为贝氏萼花，名称正确。这个问题需要一个新组合，即毛叶月见草贝氏亚种。
