Cyrtochilum dipterum

Synonym: Odontoglossum dipterum Lindl., Orchid. Linden.: 16. 1846. Oncidium dipterum (Lindl.) Beer, Prakt. Stud. Orchid.: 285. 1854.

Type: Colombia. Tolima: Mariquita, “Forests of Tolima, at the height of 900 feet”. J.J. Linden 1277 (holotype: K; isotypes: BR, P).

Illustrated specimen: Colombia.Tolima: Municipio de Ronces- valles, Yerbabuena, 3366 m. 25 Nov 2019. J.S. Moreno s.n. (LCDP voucher).

Cyrtochilum dipterum belongs to Cyrtochilum sect. Myanthium Kraenzl. and appears to be morphologically similar to Cyrtochilum ioplocon (Rchb.f.) Dalström, both sharing a column basally connate with the lip, erect, winged, with no lateral appendages, but the former has whitish, purple dotted flowers (vs. almost entirely purple, suffused with white towards the apex), and a larger lip callus with central, large knob-like outgrowth supported in front with digitate, prominent projection and additionally flanked by two pairs of long, linear to ligulate projections on both sides (vs. a tuft of short digitate processes in front of nose-like callus).