Myoxanthus pulvinatus (Barb.Rodr.) Luer (1992: 72)

Rojas-Alvarado, Gustavo, Blanco, Mario A. & Karremans, Adam P., 2021, A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae), Phytotaxa 507 (3), pp. 211-258 : 247

40. Myoxanthus pulvinatus (Barb.Rodr.) Luer (1992: 72) . (Fig. 17G)

Basionym: Anathallis pulvinata Barbosa Rodrigues (1882: 77) .

Homotypic synonym: Pleurothallis pulvinata (Barb.Rodr.) Cogniaux (1896: 563) .

TYPE:— BRAZIL. Minaes Geraes: Serra das Bicas, Barbosa Rodrigues s.n. (holotype: lost, lectotype, here designated, tab. 144, in Iconogr. Orchid. Bresil, vol. 3, at the Library of Rio de Janeiro Botanical Garden, cited as tab. 803 [unpublished] in Barbosa Rodrigues (1882: 77); copied and reproduced in black and white in Cogniaux 1896: tab. 91, fig. III; reproduced in colour in Sprunger et al. (1996, vol. 1: 202).

Distribution: — Brazil and Peru.

Notes:— This species had been previously known only from southeastern Brazil, but this species was recently documented from Tingo María National Park, Peru (Ocupa et al. 2017). Unfortunately, no herbarium specimens were prepared. The habit and flower of M. pulvinatus is similar to M. congestus but mainly distinguished by its column apex frequently bidentate on both sides and generally apiculate lip vs. with an acute tooth on both sides and apex acute to obtuse. Since the illustration cited by Barbosa Rodrigues in the original publication of A. pulvinata is the only remaining original material associated with this species, it is designated here as lectotype.