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A new species of Mesosetum (Poaceae: Paspaleae: Arthropogoninae) with a winged rachis from Serra da Canastra, Minas Gerais, Brazil



A new species of Mesosetum with a winged rachis, only known from Serra da Canastra, Minas Gerais, Brazil, is described and illustrated. The new species (Mesosetum canastrense) is morphologically similar to M. alatum, but it is distinguished mainly by the collar with a continuous line of trichomes (vs. absent or interrupted in M. alatum), synflorescences 6‒9(‒12) cm long (vs. 2.2‒3.2(‒7.5) cm long), pedicels with a truncate apex (vs. oblique), spikelets with the base surrounded by long appressed trichomes 0.8‒1.2 mm long (vs. glabrous or with short sparse trichomes ca. 0.2 mm long) and with an inconspicuous callus (vs. conspicuous and geniculate), and the lower anthecium neuter (vs. staminate or neuter). Additionally, the two species also differ in geographical distribution, since M. alatum only occurs in the Brazilian state of Mato Grosso.


Cerrado, Gramineae, Mesosetum sect. Bifaria, Panicoideae, taxonomy, Monocots

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Ab’Saber, A.N. (1977) Os domínios morfoclimáticos na América do Sul: primeira aproximação. Geomorfologia 52: 1–21.

Bachman, S., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. Zookeys 150: 117–126.

Bonasora, M.G., Pozzobon, M.T., Honfi, A.I. & Rua, G.H. (2015) Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number. Plant Systematics and Evolution 301: 2325–2339.

Chase, A. (1911) Notes on genera of Paniceae. IV. Proceedings of the Biological Society of Washington 24: 103–160.

Filgueiras, T.S. (1987) Two new species of Mesosetum (Gramineae: Paniceae) from Brazil. Brittonia 39: 306‒308.

Filgueiras, T.S. (1989) Revisão de Mesosetum Steudel (Gramineae: Paniceae). Acta Amazonica 19: 47–114.

Flora do Brasil (2020, under construction) Flora do Brasil 2020: algas, fungos e plantas. Jardim Botânico do Rio de Janeiro, Rio de Janeiro. Available from: (accessed 22 January 2019)

GPWG [Grass Phylogeny Working Group] II (2012) New grass phylogeny resolves deep evolutionary relationships and discovers C4 origins. New Phytologist 193: 304–312.

Hackel, E. (1897) Bifaria, eine neue Section der Gattung Panicum. Oesterreichische Botanische Zeitschrift 47: 73–77.

IUCN (2017) Guidelines for using the IUCN Red List categories and criteria, version 13. Prepared by the Standards and Petitions Subcommittee. Available from: (accessed 22 January 2019)

Kuhlmann, J.G. (1922) Gramíneas. Commissão de Linhas Telegraphicas Estrategicas de Matto Grosso ao Amazonas, Botanica 67: 1–95.

Kuntze, O. (1898) Revisio generum plantarum, vol. 3, pt. 2. A. Felix, Leipzig, 576 pp.

Luces, Z. (1942) New grasses from Venezuela. Journal of the Washington Academy of Sciences 32: 157–166.

Morrone, O. & Zuloaga, F.O. (2009) Keratochlaena, el nombre correcto para Sclerochlamys (Poaceae, Paniceae). Darwiniana 47: 231.

Morrone, O., Zuloaga, F.O., Davidse, G. & Filgueiras, T.S. (2001) Canastra, a new genus of Paniceae (Poaceae, Panicoideae) segretated from Arthropogon. Novon 11: 429–436.

Morrone, O., Aagesen, L., Scataglini, M.A., Salariato, D.L., Denham, S.S., Chemisquy, M.A., Sede, S.M., Giussani, L.M., Kellogg, E.A. & Zuloaga, F.O. (2012) Phylogeny of the Paniceae (Poaceae: Panicoideae): integrating plastid DNA sequences and morphology into a new classification. Cladistics 28: 333–356.

Nakajima, J.N. & Semir, J. (2001) Asteraceae do Parque Nacional da Serra da Canastra, Minas Gerais, Brasil. Revista Brasileira de Botânica 24: 471–478.

Oliveira, R.C. & Valls, J.F.M. (2009) Duas novas espécies de Paspalum L. (Poaceae: Paniceae) do Brasil. Revista Brasileira de Botânica 32: 89–94.

Oliveira, R.C., Valls, J.F.M., Gomes, S.M., Fagg, C.W. & Pozzobon, M.T. (2015) A new species of Paspalum, Notata group (Poaceae, Paspaleae), from the Cerrado biome, Brazil: description, chromosome number, and leaf blade anatomy. Phytotaxa 203: 159–168.

Oliveira, R.C., Gomes, S.M., Silva, J.G.F. & Valls, J.F.M. (2019) Mesosetum filgueirasii (Poaceae: Arthropogoninae): a new species from the Cerrado biome, Brazil, and its leaf anatomy. Systematic Botany 44. [in press]

Oliveira-Filho, A.T. & Ratter, J.A. (2002) Vegetation physiognomies and woody flora of the Cerrado biome. In: Oliveira, P.S. & Marquis, R.J. (Eds.) The cerrados of Brazil: ecology and natural history of a neotropical savanna. Columbia University Press, New York, pp. 91–120.

Peichoto, M.C., Welker, C.A.D. & Solís Neffa, V.G. (2015) Morphometric analysis of Schizachyrium (Poaceae–Andropogoneae) reveals two new species from South America. Systematic Botany 40: 461–473.

Ramos, D.M., Valls, J.F.M., Oliveira, R.C. & Graciano-Ribeiro, D. (2011) A new awned species of Paspalum (Poaceae, Panicoideae, Paniceae) from Brazil. Novon 21: 368–372.

Reis, P.A., Silva, A.L.H., Silva, A.S., Valls, J.F.M., Gomes, S.M. & Oliveira, R.C. (2015) Paspalum minutispiculatum (Poaceae, Panicoideae): a new annual species from Central Brazil. Systematic Botany 40: 746–754.

Ribeiro, A.R.O. (2013) Citogenética, reprodução e variabilidade morfológica de espécies de Mesosetum sect. Bifaria (Hack.) Chase (Poaceae: Paspaleae). Master’s Thesis, Universidade de Brasília, Brasília, 99 pp.

Romero, R. & Martins, A.B. (2002) Melastomataceae do Parque Nacional da Serra da Canastra, Minas Gerais, Brasil. Revista Brasileira de Botânica 25: 19–24.

Romero, R. & Nakajima, J.N. (1999) Espécies endêmicas do Parque Nacional da Serra da Canastra, Minas Gerais. Revista Brasileira de Botânica 22: 259–265.

Rua, G.H., Valls, J.F.M., Graciano-Ribeiro, D. & Oliveira, R.C. (2008) Four new species of Paspalum (Poaceae, Paniceae) from Central Brazil, and resurrection of an old one. Systematic Botany 33: 267–276.

Sede, S.M., Morrone, O., Aliscioni, S.S., Giussani, L.M. & Zuloaga, F.O. (2009) Oncorachis and Sclerochlamys, two new segregated genera from Streptostachys (Poaceae, Panicoideae, Paniceae): a revision based on molecular, morphological and anatomical characters. Taxon 58: 365–374.

Silva, A.S. (2017) Taxonomia e filogenia do gênero Mesosetum Steud. (Poaceae, Paspaleae). Ph.D. Dissertation, Universidade de Brasília, Brasília, 169 pp.

Silva, A.S., Villarroel, D., Ribeiro, A.R.O. & Oliveira, R.C. (2016) Eleven new records of little known taxa of Mesosetum and Paspalum (Poaceae) from Brazil and Bolivia. Phytotaxa 268: 69–79.

Steudel, E.G. (1854) Synopsis plantarum glumacearum, vol. 1. J.B. Metzler, Stuttgart, 475 pp.

Swallen, J.R. (1937) The grass genus Mesosetum. Brittonia 2: 363–392.

Thiers, B. (2019 [continuously updated]) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium, New York. Available from: (accessed 22 January 2019)

Trinius, C.B. (1831) Species graminum: iconibus et descriptionibus illustravit, vol. 3. Impensis Academiae Imperialis Scientiarum, St. Petersburg, t. 241–360.

Viana, P.L., Filgueiras, T.S. & Graciano-Ribeiro, D. (2013) A new woody bamboo (Poaceae, Bambusoideae) from Central Brazil, Aulonemia xerophylla. Novon 22: 371–376.

Zuloaga, F.O. & Soderstrom, T.R. (1985) Classification of the outlying species of New World Panicum (Poaceae: Paniceae). Smithsonian Contributions to Botany 59: 1–63.


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