, Volume 64, Issue 3, pp 305–317 | Cite as

New synonymies for Ruellia (Acanthaceae) of Costa Rica and notes on other neotropical species



As part of our study of the Acanthaceae of Costa Rica and from a phylogenetic study of Ruellia as a whole, we place R. barbillana and R. metallica in synonymy with R. terminalis. We discuss species limits of R. terminalis and provide a key that distinguishes it from close relatives including R. grantii, R. oaxacana, and R. phyllocalyx. Ruellia puri is put into synonymy with R. jussieuoides, and R. standleyi is synonymized with R. ochroleuca. Disjunct distributions characterize R. terminalis, R. jussieuoides, and R. ochroleuca, although this pattern is most extreme in R. ochroleuca. Phylogenetic analysis of DNA sequence data lends support to our synonymy decisions. New lectotypifications are provided for Arrhostoxylum achimeniflorum, Dipteracanthus puri, Dipteracanthus puri β angustifolius, Dipteracanthus puri γ gymnocladus, Lychniothyrsus ochroleucus, and Otacanthus pearcei.

Key words

Disjunct distribution Mata Atlântica Ruellieae systematics taxonomy 

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Copyright information

© The New York Botanical Garden 2012

Authors and Affiliations

  1. 1.Rancho Santa Ana Botanic GardenClaremontUSA

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