Pleurothallis bivalvis Lindl. 1846 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859
Photo by © Patricia Harding.
TYPE Drawing of P stenocardium
Drawing by © Schlechter.
Drawing by © Carl Luer.
Drawing by © J Linden .
Drawing by © Carl Luer
Drawing of P cardium/caridantha
Drawing by © Carl Luer .
Another Drawing of P cardium/caridantha
Drawing by © Carl Luer
Drawing by © Carl Luer
Drawing of P angusta-harlingii
Drawing by © Carl Luer
Drawing of P stenocardia/archidiaconii
Drawing by © Carl Luer
Drawing of P bivalvis intermediate form
Drawing by © Schlechter.
Drawing by © CarlLuer.
to 
Common Name The Two Folded Pleurothallis
Flower Size 1/2" [1.25 cm]
Found in Mexico, Costa Rica, Panama, Colombia Ecuador, Peru, Bolivia, Venezuela Guyana, Fr Guiana, Surinam and Trinidad & Tobago in wet montane cloud forests on steep slopes at elevations of 1000 to 3300 meters as a small sized, cool to cold growing, caespitose epiphyte and terrestrial with an erect, stout ramicaul subtended by 2 tubular sheaths and carrying a single, cordate-elliptical leaf that blooms in the fall, winter and spring on a sessile, fasciculate, successively single, few flowered inflorescence holding the flowers close to the leaf base.
Synonyms Acronia archidiaconi (Ames) Carnevali & G.A.Romero 2014; Acronia bivalvis (Lindl.) Luer 2005; Humboldtia bivalvis (Lindl.) Kuntze 1891 Humboltia bivalvis (Lindl.) Kuntze 1891; Humboldtia cardium (Rchb.f.) Kuntze 1891; Pleurothallis antonensis L.O.Williams 1942; Pleurothallis archidiaconi Ames 1925; Pleurothallis cardiantha Rchb.f. 1876; Pleurothallis cardium Rchb.f. 1854; Pleurothallis chanchamayoensis Schltr. 1921; Pleurothallis fuscata Braid, 1924; Pleurothallis harlingii Garay 1953; Pleurothallis ignivomi Schltr. 1921; Pleurothallis lansbergiana Regel 1856; Pleurothallis lansbergii Regel 1856; Pleurothallis lilianiae Luer 2003; Pleurothallis macrocardia Rchb. f. 1855; Pleurothallis phaeantha Schltr. 1924; Pleurothallis pichinchae Schltr. 1915; Pleurothallis sigsigensis Schltr. 1921; Pleurothallis stenocardium Schltr.1914; Zosterophyllanthos bivalvis (Lindl.) Szlach. 2011; Zosterophyllanthos ignivomi (Schltr.) Szlach. & Marg. 2001; Zosterophyllanthos lilianiae (Luer) Szlach. & Kulak 2006
References W3 Tropicos, Kew Monocot list , IPNI ;
* Orchid. Linden. 2. Lindl. 1846;
Bonplandia Rchb.f 1854 as P cardium;
Linnaea 41: 15. Rchb. f. 1877[1876] as P cardiantha;
Xenia Orchidaceae Vol 3 Reichenbach 1892 as P lansbergii drawing fide;
Xenia Orchidaceae Vol 3 Reichenbach 1896 as P cardium drawing fide;
Die Orchideen Schlechter 1915 as P cardium;
Die Orchideen der Sudamerikanischen Kordillerenstaaten IV Peru Schlechter 1921 as P chanchamayoensis;
Die Orchideen der Sudamerikanischen Kordillerenstaaten III Ecuador Schlechter 1921 as P sigsigensis;
Beitrage Zur Orchideenkunde Von Colombia 27:52 Schlechter 1924 as P phaeantha;
Beitrage Zur Orchideenkunde Von Colombia 27:131 Schlechter 1924 as P pulvinipes;
Ann. Missouri Bot. Gard. 29(4): 341-342. L.O. Williams 1942 as P antonensis;
The Orchids of Panama L.O. Williams & P Allen 1946 as P antonensis;
Venezuelan Orchids Illustrated Vol 1 Dunsterville & Garay 1959 drawing fide as P monocardia drawing good;
Native Orchids of Trinidad Schultes 1960 as Pleurothallis archidiaconi;
Venezuelan Orchids Illustrated Vol 2 Dunsterville & Garay 1961 as P linguifera not drawing fide;
Encyclopedia of Cultivated Orchids Hawkes 1965 as P cardium;
Venezuelan Orchids Illustrated Vol 4 Dunsterville & Garay 1966 as P archidiaconi not = P phyllocardioides;
Venezuelan Orchids Illustrated Vol 4 Dunsterville & Garay 1966 drawing fide;
AOS Bulletin Vol 36 #9 1967 as P archideaconi;
AOS Bulletin Vol 36 #9 1967 as P cardium;
Flora de Venezuela Foldats Volumen XV Part 2 1970 as P archidiaconi drawing good;
Flora de Venezuela Foldats Volumen XV Part 2 1970 drawing ok;
Flora de Venezuela Foldats Volumen XV Part 2 1970 as P breviscapa drawing ok;
Flora de Venezuela Foldats Volumen XV Part 2 1970 as Pleurothallis cardiantha drawing good;
Flora de Venezuela Foldats Volumen XV Part 2 1970 as Pleurothallis cardium drawing ok;
Flora de Venezuela Foldats Volumen XV Part 2 1970 as Pleurothallis stenocardium drawing good;
Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 7 385 - 448 Brieger, Maatsch and Senghas 1975 photo hmm;
Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 7 385 - 448 Brieger, Maatsch and Senghas 1975 as P ignivomii drawing hmm;
Selbyana 3: 122 Luer 1976 as P ignivoni drawing fide;
Venezuelan Orchids Illustrated Vol 6 Dunsterville & Garay 1976 as P lansbergii;
Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P archidiaconi not = P phyllocardioides;
Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 drawing fide;
Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P cardiantha not = P undulata;
Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P lansbergii drawing fide;
Icones Planetarum Tropicarum plate 235 Dodson 1980 as Pleurothallis ignivomi drawing fide;
Icones Pleurothallidinarum Systematics of Pleurothallis Vol 3 Luer 1986;
Icones Pleurothallidinarum Systematics of Pleurothallis Vol 3 Luer 1986 as P cardiantha;
Icones Pleurothallidinarum Systematics of Pleurothallis Vol 3 Luer 1986 as P ignivomi;
Icones Pleurothallidinarum Systematics of Pleurothallis Vol 3 Luer 1986 as P pulvinipes;
Native Orchids of the Eastern Carribean Kenny 1988 as P archidiaconi photo fide;
Icones Orchidacearum I Plate 87 Hagsater & Salazar 1990 as P antonensis drawing ok;
The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 photo fide;
Venezuela, Paraiso de Orquideas Romero 1997 as P cardiantha photo good;
Native Colombian Orchids Vol 6 COS 1998 photo ok;
Orchids of Venezuela [An illustrated field guide] Vol. 3 Ramiro and Carnevali 2000 drawings fide;
Orchids of Bolivia Vol 1 Pleurothallidinae Vasquez & Ibisch 2000 as P ignivomi drawing fide;
Orquideolgia Vol 22 #3 2003 sa P lilianae drawing fide;
Native Ecuadorian Orchids Vol 4 Dodson 2003 drawing fide;
Orquideas Nativas del Tachira Cesar Fernandez 2003 photo not;
Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003 as P angusta;
Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003 as P cardiantha;
Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 as P stenocardium;
Icones Pleurothallidinarum XXVII Systematics of Dryadella and Acronia Section Macrophyllae-Fasciculatae Luer 2005 as Acronia bivalvis;
Icones Pleurothallidinarum XXVII Systematics of Dryadella and Acronia Section Macrophyllae-Fasciculatae Luer 2005 as Acronia bivalvis drawings fide;
Orchids of Mexico Hagsater, Soto, Salazar, Jimenez Lopez & Dressler 2005 as P antonensis; Orchid Species of Peru Zelenko & Bermudez 2009 photo fide;
Orchids of Costa Rica Vol 5 Morales 2009 as P angusta photo fide;
Orchids of Costa Rica Vol 5 Morales 2009 as P cardiantha photo fide;
Mille et Une Mini Orchideees Roguenant 2009 photo good;
An Illustrated Field Guide to the Orchids of the Yotoco Forest Reserve Colombia Kolanowska, Escobar, Sanchez & Szlachetko 2011 as Zosterophyllanthes bivalvis drawing hmm;
Orquideas del Valle de Aburra Medellin Colombia Orqidelogia 2014 photo fide;
Guia de Orquideas de Chiapas Carlos Rommel Beutelspacher Baigts 2013 as P antonensis photo good;
LANKESTERIANA 19(2).125 - 193 Ossenbach & Jenny 2019 as P stenocardium drawing fide;
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