Pleurothallis luctuosa Rchb. f. 1876 SUBGENUS Pleurothallis SECTION Pleurothallis SUBSECTION Acroniae SERIES Acroniae Luer 1988
Photo by © Daniel Jimenez
Photo by Dale and Deni Borders
to 
Common Name The Sorrowful Pleurothallis [refers to the news of Endres' death]
Flower Size 1/2" [1.25 cm]
Found in Nicaragua, Costa Rica and Panama in very wet montane forests at elevations of 300 to 1150 meters as a miniature, hot to cool growing epiphyte with slender, erect, ramicauls enveloped basally by 2 to 3 basal, tubular sheaths and another below the middle carrying a single, apical, erect, coriaceous, narrowly elliptical-ovate, acute leaf that is narrowly cuneate and sessile basally that blooms in the spring on an erect to arching, loose, distichous, simultaneoulsy few to several flowered, 2 2/5" to 3 1/5" [6 to 8 cm] long, racemose inflorescence arising from a spathe and having thin, tubular floral bracts.
CAUTION If the provenance of your orchid is Colombia or Ecuador then procede to P tenuisepala as the South American species has been separated from this entity.
Synonyms Acronia luctuosa (Rchb.f.) Luer 2005; Humboldtia luctuosa (Rchb. f.) Kuntze 1891; Humboltia luctuosa (Rchb. f.) Kuntze 1891;
References W3 Tropicos, Kew Monocot list , IPNI ; Lankester's Epidendra Website CR; Xenia Orchidaceae Vol 3 Reichenbach 1878 drawing fide; *Linnaea 41: 48. 1877; Revis. Gen. Pl. 2: 667. 1891 as Humboldtia luctosa; Repert. Sp. Nov. Regni. Veg. Beih. 19: 107. Costa Rica Schlechter 1923; Repert. Sp. Nov. Regni. Veg. Beih. 19: 190. Costa Rica Schlechter 1923; Repert. Sp. Nov. Regni. Veg. Beih. 19: 287. Costa Rica Schlechter 1923; Icones Planetarum Tropicarum plate 242 Dodson 1980 drawing not = P tenuisepala?; Icones Planetarum Tropicarum plate 1115 Dodson 1984 drawing fide; Systematics of Pleurothallis Vol 3 Luer 1986; Icones Pleurothallidinarum Vol XVII Systematics of Pleurothallis Section Abortivae, Truncatae, Subsection Acroniae, Subgenera Dracontia and Uncifera Luer 1998 drawing = P tenuisepala; Native Colombian Orchids Vol 6 COS 1998 photo not = P tenuisepala; Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003; Icones Pleurothallidinarum Vol XXVII Luer 2005 as Acronia luctosa; Orchids of Costa Rica Vol 5 Morales 2009 photo fide; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 photo fide
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