Schlechter, Feddes Repert. Beih. 17:70.1922
Caespitose epiphyte; pseudobulbs elliptic-ovoid, 2-4 cm long, close, compressed, enclosed at base by papery bracts later weathering into fibers. Leaves solitary from apex of pseudobulb, ligulate, acute to bifid at apex, 15-40 cm long, 2-3 cm wide, conduplicate and petiolate at base. Inflorescences of 1-4 slender, 1-flowered, bracteate scapes 4-13 cm long from base of pseudobulb; bracts continuous along length of scape, mostly 1.5-2 cm long, scarcely if
at all overlapping; sepals free, spreading, subequal, yellow or tan, 1.5-2 cm long, ± obtuse at apex, the laterals adnate at base to foot of column; petals 1.5-1.7 cm long, yellow or tan, obliquely ligulate, held ± erect on either side of the column; lip conspicuously trilobate at apex, ca 1.5 cm long, yellow or tan except the middle lobe sometimes reddish-brown, the lobes curved downward above the column. Fruits not seen. Croat 12526a.
Rare, in the forest. Flowers in the late rainy season and the early dry season (October to January), especially in the late rainy season.
According to Allen (1949) in the Flora of Panama, the species is doubtfully distinct from M. ringens Reichb.f. Known only from Panama chiefly from premontane wet forest at intermediate elevations in Coclé, and Panama (west of the Canal Zone); known also from tropical moist forest in the vicinity of the Canal Zone.