Delimitation of genera in the Neotropical tribe Guettardeae (Rubiaceae) has varied; here a key outlines the current taxonomy in South America and southern Central America. Three new species of Chomelia Jacq. are described and illustrated: the unarmed species C. chiquitensis C. M. Taylor of deciduous vegetation in eastern Bolivia differs from C. sericea Müll. Arg. of Bahia, Brazil, in its linear bracts and shorter corollas; the spiny species C. costaricensis C. M. Taylor of humid vegetation in northern Costa Rica differs from C. microloba Donn. Sm. in its longer corolla and lack of domatia on the leaves; and the unarmed species C. torrana C. M. Taylor of wet montane vegetation in northwestern Colombia is distinguished by its short inflorescences with red-violet corollas and its leaves with the higher-order venation not visible. A second species of Neoblakea Standl., N. ecuadorensis C. M. Taylor of seasonal vegetation in western Ecuador, differs from N. venezuelensis Standl. in its leaves broadly obtuse to rounded at the base and its larger fruits. A second species of Pittoniotis Griseb., P. rotata C. M. Taylor, is described based on a specimen from Ecuador and is also known from Peru; it differs from P. trichantha Griseb. of seasonal lowland vegetation in the Caribbean basin in its corollas with shorter tubes, its larger fruits, and its habitat in wet premontane vegetation. The genus Stenostomum C. F. Gaertn. has been recently circumscribed to include several Neotropical species, and three additional species are here transferred to it: Chione darienensis Dwyer, as S. darienense (Dwyer) C. M. Taylor; Guettarda acreana K. Krause, as S. acreanum (K. Krause) C. M. Taylor; and G. turrialbana N. Zamora & Poveda, as S. turrialbanum (N. Zamora & Poveda) C. M. Taylor. Conservation status assessments are presented for all of these species except G. acreanum, which is widespread and in need of further study.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.