Two new records of Digitaria sect. Digitaria (Poaceae) from Venezuela and the New World

Authors

  • Shingo Nozawa Instituto Experimental Jardín Botánico, Universidad Central de Venezuela (UCV)
  • José R. Grande Allende Herbario MERF, Facultad de Farmacia y Bioanálisis, Universidad de Los Andes (ULA) and Postgrado en Botánica, Facultad de Ciencias, Universidad Central de Venezuela (UCV)
  • Yasushi Ibaragi Tokushima Prefectural Museum, Bunka-no-mori park

DOI:

https://doi.org/10.17348/jbrit.v11.i1.1149

Keywords:

Digitaria radicosa, , Digitaria velutina, Poaceae, Venezuela, range extension, Neotropics, weeds, invasive

Abstract

Digitaria radicosa is reported for the first time from the New World. The voucher specimens are from lawn gardens and sidewalks in Caracas, the capital city of Venezuela, and can be identified by its essentially smooth rachis margin. Additionally, Digitaria velutina is reported new for the Venezuelan flora. The specimens came from disturbed sites of the Andes and Coastal Cordillera, above 1500 m elevation. Digitaria velutina is recognized by its inflorescence ramification, clearly branched in the lowest racemes, and also by having the smallest spikelets among the Venezuelan species of section Digitaria. A key is provided for the section.

References

Clayton, W.D. & S.A. Renvoize. 1982. Gramineae (Pt. 3). In: R.M. Polhill, ed. Flora of Tropical East Africa. A.A. Balkema, Rotterdam, Netherlands. Pp. 619–655.
Clayton, W.D., M.S. Vorontsova, K.T. Harman, & H. Williamson. 2006 onwards. GrassBase: The online world grass flora. Available at www.kew.org/data/grasses-db.html. Accessed January 2017.
Giraldo-Cañas, D. 2016. Estudios morfológicos y taxonómicos en Digitaria Haller (Poaceae: Panicoideae: Paniceae): inventario y primer registro de Digitaria velutina (Forssk.) P. Beauv. para Sudamérica. Biota Colomb. 17(2):19–38.
Häfliger, E. & H. Scholz. 1980. Grass weeds. Vol. I. Weeds of the subfamily Panicoideae. Documenta Ciba-Geigy, Basle, Switzerland.
Herbst, D. & W.D. Clayton. 1998. Notes on the grasses of Hawai‘i: new Records, corrections, and name changes. Bishop Mus. Occas. Pap. 55:17–38.
Koba, H., Y. Ibaragi, & T. Katsuyama. 2012. ?????????: the handbook of common grasses. ??????, Tokyo, Japan.
Pohl, R.W. & G. Davidse. 1994. Poaceae. Flora Mesoamericana. Vol. 6. Instituto de Biología, Universidad Nacional Autónoma de México, Distrito Federal, México.
The Plant List (Version 1.1). 2013. Available at www.theplantlist.org. Accessed January 2017.
Tropicos.org. Available at www.tropicos.org. Accessed January 2017.
USDA, NRCS. 2017. The PLANTS Database. Available at plants.usda.gov. Accessed January 2017.
Vega, A. & Z. Rúgolo de Agrasar. 2005. Novedades taxonómicas y sinopsis del género Digitaria (Poaceae, Panicoideae, Paniceae) en Colombia y Venezuela. Darwiniana 43(1–4):232–267.
Verloove, P. 2008. Studies within the genus Digitaria Haller (Poaceae, Panicoideae) in southwestern Europe. Candollea 63(2):227–233.
Webster, R. 1983. A revision of the genus Digitaria Haller (Paniceae: Poaceae) in Australia. Brunonia 6:131–216.
Webster, R. 1987. Taxonomy of Digitaria sect. Digitaria in North America (Paniceae: Poaceae). Sida 12(1):209–222.

Published

2017-07-24

How to Cite

Nozawa, S. ., Grande Allende, J. R. ., & Ibaragi, Y. . (2017). Two new records of Digitaria sect. Digitaria (Poaceae) from Venezuela and the New World. Journal of the Botanical Research Institute of Texas, 11(1), 169–173. https://doi.org/10.17348/jbrit.v11.i1.1149