Rediscovery of Ruellia reitzii (Acanthaceae), a narrowly endemic critically endangered species from Santa Catarina, southern Brazil, and notes on R. squarrosa

ABSTRACT

Ruellia reitzii was first collected in 1948 by the prominent botanist Raulino Reitz in Santa Catarina state, southern Brazil, and the species was only known from two gatherings. Because its most recent collection was in 1953, the species was considered possibly extinct. In this work we present the rediscovery of this species, 65 years after its last collection. Here we complement and rectify the morphologic knowledge of the species, present the first photographs of living specimens and assess its conservation status. We also present notes on the authorship of the name R. squarrosa, and provide an identification key to the species of Ruellia that occur in Santa Catarina.

KEYWORDS:

• Atlantic rainforest
• Lamiales
• neotropics
• threatened species

Acknowledgements

GH acknowledges Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for a post-doctoral fellowship [process number 153430/2018-4]. We also thank Christian Bräuchler (W) for kindly providing the image of the lectotype of Dipteracanthus squarrosus.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico [153430/2018-4]; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Brazilian Program for Biodiversity Research (PPBio) Atlantic Forest Network [CNPq 457451/2012-9]; CNPq/Capes/FAPs/BC-Fundo Newton/PELD [number 15/2016]. ERDS is supported by CNPq [process number 311158/2018-8]. This research also is part of the MIND.Funga Project (http://www.http://mindfunga.ufsc.br).