Pleurothallis rubens Lindl. 1836 SUBGENUS Specklinia SECTION Acuminatae Luer 1986
Photos by © Rebecca Repasky and The Atrium Website
Photo by © Gustavo Righelato
Brazilian Plant and Inflorescence
Photos by © Dalton Holland Baptista
Brazilian Plant and flowers in Situ Minas Gerais Brazil
Photo by © Ismael Nilton Vischi
Drawing by Helmut Seehauer
to 
Common Name The Becoming Red Pleurothallis [refers to the dried flowers]
Flower Size 1/2" [1.25 cm]
Found in Ecuador, Peru, Bolivia and Brazil in wet montane forests at elevations of 600 to 2750 meters as a miniature sized, warm to cold growing, caespitose epiphyte with erect ramicauls enveloped by 1 to 3 large, complanate, scarious sheaths and carrying a single, apical, oblong-elliptic, subacute, blunt, coriaceous leaf that blooms in the fall on an erect to arching, subtended by a spathe and arisng through an annulus below the apex of the ramicual, 4.4" [11 cm] long, simultaneously opening, several flowered, racemose inflorescence with several close, tubular bracts and ovate, acute, sub-infundibuliform floral bracts that cover 1/2 of the ovary.
Separated from other species by the labellum with subapical, transverse ridges of blunt teeth and a very elongate, beaked clinadrial hood.
CAUTION It seems that this orchid is variable in form of sepals, petals and lip. Here are represented both Peruvian and Brazilian specimens. I only have references on the Peruvian Orchid, they are absolutely correct to Bennett & Christenson 1998.
Synonyms Anathallis amblyopetala (Schltr.) Pridgeon & M.W. Chase 2001; Anathallis rubens (Lindl.) Pridgeon & M.W. Chase 2001; Humboldtia rubens (Lindl.) Kuntze 1891; Humboltia rubens (Lindl.) Kuntze 1891; Pleurothallis amblyopetala Schltr. 1913; Pleurothallis excisa C. Schweinf. 1953; Pleurothallis montserratii Porsch 1905; Pleurothallis rubens var. latifolia Cogn. 1896; Pleurothallis rubens var. longifolia Cogn. 1896; Specklinia rubens (Lindl.) F.Barros 1983 publ. 1984; Stelis montserratii (Porsch) Karremans 2014; Stelis neorubens Chiron 2012
References W3 Tropicos, Kew Monocot list , IPNI ;
* Edwards's Bot. Reg. 21: t. 1797 Lindley 1835;
Revis. Gen. Pl. 2: 668 Kuntze 1891 as Humboltia rubens;
Flora Brasiliensis Vol III Part 4:565 Martius, Cogniaux 1893;
Flora Brasiliensis Vol III Part 4:566 Martius, Cogniaux 1896; as P rubens var latifolia
Flora Brasiliensis Vol III Part 4:tab 87 Martius, Cogniaux 1896; as P rubens var latifolia drawing fide;
Flora Brasiliensis Vol III Part 4:566 Martius, Cogniaux 1896; as P rubens var longifolia
Oesterr. Bot. Z. 55: 158 Porsch 1905 as P montserratii;
Repert. Spec. Nov. Regni Veg. 12: 486 Schlechter 1913 as P amblyopetala;
Die Orchideen Schlechter pg180 1915;
Bot. Mus. Leafl. 16: 48 Schweinfurth 1953 as P excisa;
Bot. Mus. Leafl. 16: plate 6 Schweinfurth 1953 as P excisa drawing fide;
Encyclopedia of Cultivated Orchids Hawkes 1965;
Orchidaceae Brasilensis Band 1 Pabst & Dungs 1975 drawing ok;
Hoehnea 10: 110 F Barros 1983 publ. 1984 as Specklinia rubens;
Icones Pleurothallidianrum Vol III Systematics of Pleurothallis Luer 1986 as Pleurothallis amblyopetala;
Orchids of the High Mountain Atlantic Rainforest in SE Brazil Warren & Miller 1994 drawing/photo fide;
Icones Orchidacearum Peruviarum Plate 552 Bennett & Christenson 1998 drawing fide to the first 2 photos;
Orchids of Bolivia Vasquez & Ibisch Vol 1 2000 drawing ok;
Lindleyana Vol 16 No 4:247 Pridgeon & M.W. Chase 2001 as Anathallis amblyopetala
Lindleyana Vol 16 No 4:250 Pridgeon & M.W. Chase 2001 as Anathallis rubens;
Macchu Picchu Orchids Eric Christenson 2003;
Icones Pleurothallidinarum Vol XXVI Pleurothallis subgenus Acianthera and Three Allied subgenera, A Second Century of new Species of Stelis of Ecuador, Epibator, Ophidion and Zootrophion Luer 2004 as Specklinia rubens;
Orquideas Da Chapada Diamantina Brito & Cribb 2005 drawing good;
Orchid Digest Vol 71 No 3 2007 photo fide;
The Organ Mountain Range Its History and Its Orchids Miller, Warren, Miller and Seehawer 2008 drawing ok;
Orchid Species of Peru Zelenko Bermudez 2009 as Anathalis rubens photo fide to the second photo;
Phytotaxa 46: 55 Chiron 2012 as Stelis neorubens;
Lankesteriana 13: 329 Karremans 2014 as Stelis montserratii;
Rodriguésia 70: e02722017 Anathallis (Orchidaceae: Pleurothallidinae) no estado do Paraná, Brasil Santos, Toscano and Smidt 2019 as Anathallis rubens drawing/photo fide
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