We present a taxonomic revision of the Cohniella species occurring south of the Amazon River in South America. In this revision, we recognize a naturally occuring hybrid and six species, one of which is herein proposed as new, Cohniella caatingaensis, restricted to the Caatinga of northeastern Brazil. Furthermore, we clarify the specific circumscriptions and distribution range of C. binotii, C. cepula, and C. sprucei. Based on vegetative and floral morphology, we recognize two species groups, the C. jonesiana and the C. cepula complexes. Detailed taxonomic descriptions are given for all species, including short accounts of their distribution and ecology, diagnostic characters, variation range, taxonomic comments, and additional material examined. Relevant iconography is listed for each species. Additionally, a key and a table featuring diagnostic characters to distinguish between species are provided as well as distribution maps for each species-complex.
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.