Abstract
Two new species of Disteganthus (Bromeliaceae: Bromelioideae) are described and illustrated. Disteganthus gracieae is described to place specimens previously misidentified as Disteganthus lateralis, but that differ substantially from this species by their gradually narrowed leaf blades, slender inflorescence rachis, long-pedicellate flowers, long-connate sepals, and glabrescent ovaries. Disteganthus morii is described from recent collections in central Suriname and can be distinguished from other species in the genus by its narrow leaves and densely floccose, long flowers. Because these new additions increase the number of species of Disteganthus from two to four, an updated description of the genus, including a taxonomic key and a general overview of the geographic distribution of the species, is presented.
Resumen
Se describen e ilustran dos especies nuevas de Disteganthus (Bromeliaceae: Bromelioideae). Disteganthus gracieae se describe para asignar especímenes erróneamente identificados como Disteganthus lateralis, pero que difieren de esta especie por sus hojas que se angostan gradualmente hacia la base, raquis de la inflorescencia delgado, flores largamente pediceladas, sépalos altamente connatos y ovarios glabrescentes. Disteganthus morii se describe de colecciones recientes en Surinam central y se distingue de otras especies en el género por sus hojas delgadas y flores densamente flocosas y largas. Debido a que la descripción de estas dos especies incrementa al doble la riqueza de Disteganthus, se presenta una descripción actualizada del género, incluyendo una clave taxonómica y una mirada general de la distribución geográfica de sus especies.
Similar content being viewed by others
Literature Cited
Funk, V. A., T. Hollowell, P. Berry, C. Kelloff, & S. N. Alexander. 2007. Checklist of the Plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Department of Botany, National Museum of Natural History. Washington D.C. U.S.A.
Gouda, E. 1994. Disteganthus lateralis (Bromeliaceae), a new combination for the flora of central French Guiana. Brittonia 46: 134–136.
Gouda, E. 1999. Studies on the flora of the Guianas No. 90: Checklist of Bromeliaceae of the Guianas with notes on critical species. Selbyana 20: 30–39.
Maguire, B. 1945. Notes on the geology and geography of Tafelberg, Suriname.Geographical Review 35: 563–579.
Silvestro, D., G. Zizka, & K. Schulte. 2014. Disentangling the effects of key innovations on the diversification of Bromelioideae (Bromeliaceae). Evolution 68: 163–175.
Smith, L. B. 1954. Studies in the Bromeliaceae, VXII.Contributions from the United States National Herbarium 29: 525–526.
Smith, L. B & R. J. Downs. 1979. Bromelioideae (Bromeliaceae). Flora Neotropica Monograph 14: 1493–2142.
Acknowledgments
We thank Andrew Short for his support during the expedition in Central Suriname. We also thank the curators of the herbaria BBS, NY, and US for allowing us the direct revision of specimens for this study. We are grateful to Bobbi Angell for preparing the illustrations, and finally, to Carol Gracie and Scott Mori for sharing their images and pickled material for the descriptions of the new species.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Aguirre-Santoro, J., Michelangeli, F. Two new species of Disteganthus (Bromeliaceae) from Suriname and French Guiana. Brittonia 67, 233–242 (2015). https://doi.org/10.1007/s12228-015-9378-0
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12228-015-9378-0