Abstract
A new variety of Tripogon nicorae from Peru is described and illustrated. The new taxon, Tripogon nicorae var. aristulata, has lower glumes with scabrous keels (vs. smooth keels in T. nicorae var. nicorae) and narrow paleas 0.4−0.5 mm wide [vs. (0.66−)0.9–1.4 mm wide in T. nicorae var. nicorae]. A discussion and an identification key to the species and varieties of Tripogon and Tripogonella in Peru are presented.
References
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<p>Ulloa-Ulloa, C.U., Acevedo-Rodríguez, P., Beck, S., Belgrano, M.J., Bernal, R., Berry, P.E., Brako, L., Celis, M., Davidse, G., Forzza, R.C., Gradstein, S.R., Hokche, O., León, B., León-Yánez, S., Magill, R.E., Neill, D.A., Nee, M., Raven, P.H., Stimmel, H., Strong, M.T., Villaseñor, J.L., Zarucchi, J.L., Zuloaga, F.O. & Jørgensen, P.M. (2017) An integrated assessment of the vascular plant species of the Americas. <em>Science</em> 358: 1614–1617. https://doi.org/10.1126/science.aao0398</p>
<p>Vaupel, F.K.J. (1913) Cactaceae Andinae.<em> Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie</em> 50 (2–3, Beibl. 111): 12–31.</p>
<p>Ekman, E.L. (1912) Beiträge zur Gramineenflora von Misiones. <em>Arkiv för Botanik</em> 11: 1−61.</p>
<p>Esri Inc. (2009) ArcGIS 9·3. Redlands, CA: Environmental Systems Research Institute. Available from: http://www.esri.com (accessed 15 July 2021)</p>
<p>Gmelin, J.F. (1791) <em>Caroli a Linné systema naturae per regna tria naturae. Tomus II. Editio decima tertia, aucta, reformata 2 parts. Leipzig.</em> (Syst. Nat.), 884 pp.</p>
<p>JSTOR (2021) <em>JSTOR Plant Science.</em> Available from: http://plants.jstor.org/ (accessed 3 January 2021).</p>
<p>Kellogg, E.A. (2015) Poaceae. <em>In</em>: Kubitzki, K. (ed.) <em>The Families and Genera of Vascular Plants</em>, vol. XIII. Springer, New York, 416 pp. https://doi.org/10.1111/boj.12458</p>
<p>Nees, C.G. (1829) Agrostologia brasiliensis. <em>In</em>: Martius, C.F.P. (ed.) <em>Flora Brasiliensis seu Enumeratio Plantarum</em> 2. J.G. Cottae, Stuttgart y Tübingen, pp. 1−608.</p>
<p>Nicora, E.G. & Rúgolo de Agrasar, Z.E. (1991) Una nueva especie de <em>Tripogon</em> Roemer & Schultes (Poaceae-Eragrosteae), <em>Tripogon ekmanii</em> E. Nicora & Rúgolo. <em>Candollea</em> 46: 533–535.</p>
<p>Peterson, P.M., Romaschenko, K. & Herrera Arrieta, Y. (2016) A molecular phylogeny and classification of the Cynodonteae (Poaceae: Chloridoideae) with four new genera: <em>Orthacanthus, Triplasiella, Tripogonella</em>, and <em>Zaqiqah</em>; three new subtribes: Dactylocteniinae, Orininae, and Zaqiqahinae; and a subgeneric classification of <em>Distichlis</em>. <em>Taxon</em> 65: 1263–1287. https://doi.org/10.12705/656.</p>
<p>Roemer, J.J. & Schultes, J.A. (1817) <em>Systema Vegetabilium</em> 2. J.G. Cottae: Stuttgart, 964 pp.</p>
<p>Rúgolo De Agrasar, Z.E. & Vega, A.S. (2004) <em>Tripogon nicorae</em>, a new species & synopsis of <em>Tripogon</em> (Poaceae: Chloridoideae) in America. <em>Systematic Botany</em> 29 (4): 874–882. http://dx.doi.org/10.1600/0363644042451125</p>
<p>Soreng, R.J., Peterson, P.M., Romaschenko, K., Davidse, G., Teisher, J.K., Clark, L.G., Barberá, P., Gillespie, L.G. & Zuloaga, F.O. (2017) A worldwide phylogenetic classification of the Poaceae (Gramineae) II: An update and a comparison of two 2015 classifications. <em>Journal of Systematics and Evolution</em> 55 (4): 259−290. [http://onlinelibrary.wiley.com/doi/10.1111/jse.12262/full]</p>
<p>Tovar, O. (1993) Las Gramíneas (Poaceae) del Perú. <em>Ruizia: Monografías del Real Jardín Botánico, Consejo Superior de Investigaciones Científicas </em>13: 1–482.</p>
<p>Ulloa-Ulloa, C.U., Acevedo-Rodríguez, P., Beck, S., Belgrano, M.J., Bernal, R., Berry, P.E., Brako, L., Celis, M., Davidse, G., Forzza, R.C., Gradstein, S.R., Hokche, O., León, B., León-Yánez, S., Magill, R.E., Neill, D.A., Nee, M., Raven, P.H., Stimmel, H., Strong, M.T., Villaseñor, J.L., Zarucchi, J.L., Zuloaga, F.O. & Jørgensen, P.M. (2017) An integrated assessment of the vascular plant species of the Americas. <em>Science</em> 358: 1614–1617. https://doi.org/10.1126/science.aao0398</p>
<p>Vaupel, F.K.J. (1913) Cactaceae Andinae.<em> Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie</em> 50 (2–3, Beibl. 111): 12–31.</p>