Calamagrostis macrophylla (Pilg.) Pilg., Bot. Jahrb. Syst. 42: 60. 1908. Deyeuxia macrophylla Pilg., Bot. Jahrb. Syst. 25(5): 711-712. 1898.

Type. ECUADOR. Pinchincha: Verdecuchu, Aug. 1879 [7 Aug. 1870], A. Stübel 34 (lectotype, designated by Vega and Rúgolo de Agrasar (2013: 27): BAA (BAA00000810 [image!] fragm. ex B; isolectotypes: S (S-R-823 [image!]) fragm., US (US00153721!, US00133532!)).

= Deyeuxia macrostachya Sodiro, Revista Col. Nac. Vicente Rocafuerte 12: 64. 1930, syn. nov. Type: ECUADOR. In pasq. M. Chimbarazo [En los pajonales de los montes Pichincha y Chimborazo], Nov. [Dec.] 1890, L. Sodiro 265 [s.n.] (lectotype, designated here: US (US00406351!); isolectotype: S (S-R-1460 [image!])).

Comments.

Deyeuxia macrostachya is known only from the type specimen collected by Sodiro in páramo grasslands close to mount Pichincha and Chimborazo, Ecuador. We found no noticeable differences between this and Pilgers specimens. The large, lax panicle with semiverticillate branches, similar spikelet morphology including the lemma apex bifid with aristulate teeth and rachilla hairs only reaching the apex of the palea, support D. macrostachya being synonymised under C. macrophylla .