Chusquea contrerasii and C. guzmanii (Poaceae, Bambusoideae, Bambuseae, Chusqueinae), two new endemic species from Jalisco, Mexico Author Ruiz-Sanchez, Eduardo Departamento de Botánica y Zoología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Camino Ing. Ramón Padilla Sánchez 2100, Nextipac, Zapopan, Jalisco, 45200, Mexico. & Laboratorio Nacional de Identificación y Caracterización Vegetal (LaniVeg), Camino Ing. Ramón Padilla Sánchez 2100, Nextipac, Zapopan, Jalisco, 45200, Mexico. Author Romero-Guzman, Rafael Vivero de Nativas, Plantas Regionales Puerto Vallarta, carretera a Las Palmas 4145, col. El Zancudo, 48265, Puerto Vallarta, Jalisco, Mexico. Author Flores-Argüelles, Alejandra Universidad Autónoma Metropolitana Unidad Iztapalapa, División de Ciencias Biológicas y de la Salud, Departamento de Biología, Maestría en Biología, Apdo. postal 55 - 535, 09340 México, D. F., México. Author Ortiz-Brunel, Juan Pablo Departamento de Botánica y Zoología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Camino Ing. Ramón Padilla Sánchez 2100, Nextipac, Zapopan, Jalisco, 45200, Mexico. & Laboratorio Nacional de Identificación y Caracterización Vegetal (LaniVeg), Camino Ing. Ramón Padilla Sánchez 2100, Nextipac, Zapopan, Jalisco, 45200, Mexico. Author Clark, Lynn G. Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011 - 4009, USA. text Phytotaxa 2021 2021-04-22 497 3 285 297 http://dx.doi.org/10.11646/phytotaxa.497.3.7 journal article 10.11646/phytotaxa.497.3.7 1179-3163 5424041 Key to the species of Chusquea sect. Longifoliae in Mexico (based on vegetative and reproductive characters) 1. Culms robust, 2–6 cm in diameter, solid becoming fistulose with age; culm leaf blades persistent; subsidiary buds at mid-culm nodes 80–100; spikelets 10.4–20.6 mm long .................................................................................................................. C. longifolia 1. Culms thinner, 0.5–1 cm in diameter, solid; culm leaf blades deciduous; subsidiary buds at mid-culm nodes 5–50; spikelets 4.5–12.6 mm long...............................................................................................................................................................................2 2. Culm leaf sheaths with the overlapping margin fused above the base; foliage leaf blades tessellate; synflorescence an open panicle; glume III apiculate, glume IV subulate ................................................................................................................................ C. aperta 2. Culm leaf sheaths with the margins free; foliage leaf blades not tessellate; synflorescence a narrow congested panicle; glumes III and IV awned or mucronate................................................................................................................................................................3 3. Branches 5–10 per node; foliage leaf blades 1.1–1.8 cm wide, oblong-lanceolate; synflorescences 7–13 cm long; lemmas pubescent ............................................................................................................................................................................. C. cortesii 3. Branches 10–31 per node; foliage leaf blades 0.4–1 cm wide, linear-lanceolate; synflorescences 2.5–8 cm long; lemmas scabrous or pubescent........................................................................................................................................................................................4 4. Lemmas scabrous, awned................................................................................................................................................... C. nelsonii 4. Lemmas pubescent, acuminate or mucronate.....................................................................................................................................5 5. Glume III 1.6–2.2 mm long; glume IV 2–2.6 mm long, glabrous, apex mucronate; lemma 3.8–4.3 mm long, mucronate................ .......................................................................................................................................................................................... C. guzmanii 5. Glume III 3.1–3.8 mm long; glume IV 3.4–4.4 mm long, scabrous, apex awned; lemma 6.4–7.3 mm long, acuminate.................... ........................................................................................................................................................................................ C. contrerasii