Background and Aims:

In the Mexican Yucatán Peninsula, up to seven species of the genus Indigofera have been reported: I. indica, I. jamaicensis, I. lespedezioides, I. suffruticosa, I. thibaudiana, I. tinctoria and I. trita subsp. scabra. The purpose of this study is to evaluate the diversity of the genus in the peninsula, Campeche, Quintana Roo, and Yucatán.

Methods:

Botanical collections were carried out in the states of Campeche, Quintana Roo, and Yucatán during 2016 and 2017. Material from the CICY and UCAM herbaria was reviewed and the plants were identified according to specialized literature.

Key results:

On the one hand, two new records are added for the Yucatán Peninsula: Indigofera microcarpa and I. miniata. On the other hand, I. indica, I. jamaicensis and I. tinctoria are excluded. Taxonomic and ecological comments on the species are made, and a diagnostic key, a general distribution map and images of some living plants are presented.

Conclusions:

With this study, the number of species of the genus Indigofera on the Yucatán Peninsula increases to six.

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