A general habit and a spikelet of Calamagrostis guamanensis Escalona, J.R.I. Wood 4064 (FMB), Calamagrostis heterophylla (Wedd.) Pilg., S.P. Sylvester 3158 (US), Calamagrostis pisinna Swallen, S.P. Sylvester 3107 (US), and Calamagrostis rigida (Kunth) Trin. ex Steud., S.P. Sylvester 3125 (US). Habit scale bar 5 cm; spikelet scale bar 1 mm.

  Part of: Sylvester SP, Soreng RJ, Bravo-Pedraza WJ, Cuta-Alarcon LE, Giraldo-Cañas D, Aguilar-Cano J, Peterson PM (2019) Páramo Calamagrostis s.l. (Poaceae): An updated list and key to the species known or likely to occur in páramos of NW South America and southern Central America including two new species, one new variety and five new records for Colombia. PhytoKeys 122: 29-78. https://doi.org/10.3897/phytokeys.122.33032