Masdevallia melanoxantha Linden & Rchb. f. 1854 SUBGENUS Polyantha SECTION Alaticaules SUBSECTION Alaticaules {Krzl.] Luer 1986 Photo by Orchi and Wiki Orchids

Dorsal sepal relaxed Photo by Micheline GUILMIN

Another Flower Photo courtesy of Dale and Deni Borders

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Common Name The Dark Yellow Masdevallia

Flower Size 1" [2.5 cm]

Found in the northeastern cordillera of Boyaca and Norte de Santander Colombia and in western Venezuela in cloud forests on mossy tree trunks and branches at elevations of 1400 to 2800 meters as a miniature sized, warm to cold growing, caespitose epiphyte with erect, stout ramicauls enveloped by 2 to 3 loose, tubular sheaths carrying a single, apical, erect, thickly coriaceous, elliptical, subacute to obtuse leaf that is narrowly cuneate below into the stout petiole that blooms in the spring and fall on a congested, successively several flowered, racemose, 14" [35 cm] long, slender, erect, triquetrous inflorescence arising from low on the ramicaul witha basal bract and a thin, imbricating, tubular floral bract holding the successive, several flowers well above the leaf.

Synonyms Alaticaulia melanoxantha (Linden & Rchb.f.) Luer 2006; Masdevallia asperrima Kraenzl. 1922

References Kew Monocot list , IPNI; *Bonplandia Rchb.f 1854; Bonplandia Rchb.f 1855; Venezuelan Orchids Vol 5 Dunsterville & Garay 1966 drawing fide; Orchids of Venezuela An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 drawing fide; Orquideologia Vol 16 No1 1983; Systematics of Masdevallia Vol 2 Luer 1986; Icones Orchidacearum Peruviarum Plate 288 Bennett & Christenson 1995; Venezuela; Paraiso de Orquideas Romero 1997 photo fide; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 drawing fide; Icones Pleurothallidinarum XIX Systematics of Masdevallia Part 1 Luer 2000; Orquideas Nativas del Tachira Cesar Fernandez 2003 photo fide; Icones Pleurothallidinarum XXV Systematics of Masdevallia Part Five Luer 2003; Icones Pleurothallidinarum Vol XXVIII Luer 2006 as Alaticaulia melanoxantha; Libro Rojo de Plantas De Colombia Vol 6 Primera Parte Saenz 2007

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