Calamagrostis heterophylla (Wedd.) Pilg., Bot. Jahrb. Syst. 42: 64. 1908. Deyeuxia heterophylla Wedd., Bull. Soc. Bot. France 22: 177, 180. 1875.

Sylvester, Steven P., Soreng, Robert J., Bravo-Pedraza, William J., Cuta-Alarcon, Lia E., Giraldo-Canas, Diego, Aguilar-Cano, Jose & Peterson, Paul M., 2019, Paramo Calamagrostis s. l. (Poaceae): An updated list and key to the species known or likely to occur in paramos of NW South America and southern Central America including two new species, one new variety and five new records for Colombia, PhytoKeys 122, pp. 29-78 : 29

Calamagrostis heterophylla (Wedd.) Pilg., Bot. Jahrb. Syst. 42: 64. 1908. Deyeuxia heterophylla Wedd., Bull. Soc. Bot. France 22: 177, 180. 1875. Fig. 5 C, D

Type. Bolivia. [ Potosí], A. D’Orbigny 202 (lectotype, designated by Rúgolo de Agrasar (2012: 201): P (P00729766 [image!]); isolectotypes: BAA (BAA00001845 [image!]), US (US00133531!), W (W18890120011 [image!])).

= Chaetotropis andina Ball, J. Linn. Soc. Bot. 22: 58. 1885. Type: Peru. Ex Saxosis Andium Peruviae juxta Paquim Chicla, 12000 –13000’ s.m. [3658-3962 m alt.], 21-23 Apr. 1882, J. Ball s.n. (holotype: P; isotypes: BAA (BAA00001704 [image!]) fragm., K, US (US00344798!) fragm. ex K & ex LE).

= Calamagrostis heterophylla (Wedd.) Pilg. var. robustior Pilg., Bot. Jahrb. Syst.: 64. l908. Type: Peru. Puno: Azangaro, in saxosis calcareis, 4000 m alt., Feb. 1902, A. Weberbauer 474 (holotype: B (not found); isotype: US (US00153711!)).

= Calamagrostis heterophylla (Wedd.) Pilg. var. pubescens Pilg., Bot. Jahrb. Syst.: 64. 1908. Type: Peru. Puno: in provincia Sandia, supra Cuyocuyo, in campis fructisibus nonnullis intermistix, 3700-3800 m alt., May 1902, A. Weberbauer 905 (holotype: B (not found); isotype: US (US00153712!)).

= Calamagrostis calvescens Pilg., Bot. Jahrb. Syst. 42: 65. 1908. Type: Peru. Ancash: Prov. Cajatambo, 3000-3300 m alt., 13 Apr. 1902, A. Weberbauer 2842 (lectotype, designated by Nicora and Rúgolo de Agrasar (1998: 168): BAA (BAA00000758 [image!]) fragm. ex B; isolectotypes: MOL, US (US00131526!)).

= Calamagrostis mulleri Luces, Bol. Soc. Venez., Cienc. Nat. 15 (80):9. 1953. Type: Venezuela. Edo. Mérida: Páramo de Mucuchíes, 4000 m alt., 11 Nov. 1939, A.S. Müller 897 (holotype: VEN (VEN20682 [image!]); isotypes: MO, US (US00149289!)).

= Calamagrostis macbridei Tovar, Mem. Mus. Javier Prado 11:63. 1960. Type: Perú. Pasco, Huarón, northern part Cerro Pasco, northeastern slope, 14000 ft. [4267 m] alt., 12 Jun. 1922, J.F. Macbride & W. Featherstone 998 (holotype: US (US00153707!); isotypes: F (F0040679F [image!]), SI (SI000619 [image!]) fragm.).

= Calamagrostis swallenii Tovar, Mem. Mus. Hist. Nat. "Javier Prado" 11: 66. 1960. Deyeuxia swallenii (Tovar) Rúgolo, Rev. ~ Deyeuxia ~ Bolivien 128. 1995. Type: Peru. Huancavelica: Prov. Huancavelica: Tausiri, cerca a Manta, pajonal de Puna, 4500 m alt., 31 Mar. 1953, O. Tovar 1168 (holotype: US (US00133195!); isotypes: GH (GH00023323 [image!]), K (K000308446!), MO (MO115821 [image!]), USM (USM000722 [image!])).

Comments.

Previously known from high Andean regions of Venezuela ( Hokche et al. 2008; Bono 2010; Briceño 2010), Peru ( Tovar 1993), Bolivia ( Villavicencio 1995, 1998), northern Chile and northwest Argentina ( Rúgolo de Agrasar 2012). The specimens collected exhibit characters of both Calamagrostis heterophylla and Calamagrostis brevipaleata Swallen, an Ecuadorian endemic, with both species having heteromorphic leaf blades, the cauline glabrous and those of the innovations pilose. The species bear more affinity to C. heterophylla as the lemmas measure less than 4.2 mm (> 5 mm long in C. brevipaleata ) and the leaf blades measure <10 cm long (10-25 cm long in C. brevipaleata ). However, the specimens do have characteristics of C. brevipaleata in terms of the lemma surfaces, which are smooth proximally and scabrous distally and no great differentiation in width between the cauline and tiller leaf blades.

Specimen examined.

COLOMBIA. Boyacá: Mun. Chiscas, páramo El Penon, borde de bosque de Polylepis creciendo sobre roca, 6°36.0714'N; 72°26.229'W, 3917 m alt., 5 Mar. 2018, S.P. Sylvester, R.J. Soreng, W. Bravo & L.E. Cuta 3158 (COL, FMB, K, US).

Figures

Figure 5. 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.