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A synopsis of Costa Rican Ruellia (Acanthaceae), with descriptions of four new species

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Abstract

We describe four new species of Ruellia from Costa Rica; three from the Osa Peninsula, Puntarenas province (R. exilis, R. mira, R. odorata), and one from the southwestern corner of San José province (R. norvegigratiosa). Ruellia matagalpae is reported as a new record for the country. New combinations are made in Ruellia for the two Costa Rican species of Blechum (R. blechum and R. costaricensis). Three species are reduced to synonymy, and another species is considered doubtfully worthy of recognition. Notable range extensions are reported for two species. Corollas and fruits of all 22 Costa Rican species of Ruellia are shown and compared as easily used identification aids. An informal guide to species groups and a dichotomous key to the 22 species are presented.

Resumen

Se describen y se ilustran cuatro especies neuvas para la ciencia de Ruellia para Costa Rica; tres de la Península de Osa, provincia de Puntarenas (R. exilis, R. mira, R. odorata) y una del extremo suroeste de la provincia de San José (R. norvegigratiosa). Reportamos a Ruellia matagalpae como especie encontrada en el país por primera vez. Se proponen nuevas combinaciones en Ruellia para las dos especies de Blechum que se encuentran en Costa Rica (R. blechum y R. costaricensis). Tres especies son reducidas a sinonimia y una cuarta especie es presentada como dudosa. Se reportan extensiones de la distribución geográfica para dos especies. Presentamos ilustraciones de las corolas y los frutos de las 22 especies costaricenses de Ruellia; estas estructuras presentan características muy útiles para la identificación. Las 22 especies de Ruellia se contrastan en un guía informal para grupos de especies y en una clave dicotómica.

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McDade, L.A., Tripp, E.A. A synopsis of Costa Rican Ruellia (Acanthaceae), with descriptions of four new species. Brittonia 59, 199–216 (2007). https://doi.org/10.1663/0007-196X(2007)59[199:ASOCRR]2.0.CO;2

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  • DOI: https://doi.org/10.1663/0007-196X(2007)59[199:ASOCRR]2.0.CO;2

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