IOSPE PHOTOS

Photos by © Jay Pfahl

Drawing by © Carl Luer

Common Name The Small Heart Pleurothallis [refers to the leaf and the labellum]

Flower Size .4" [1 cm]

Found in Colombia, Venezuela, Ecuador, Peru and Bolivia at elevations of 700 to 2600 meters as a medium sized, warm to cold growing epiphyte with slender, suberect to horizontal ramicauls enveloped basally by 2 close basal tubular sheaths and another towards the middle and carrying a single, apical, spreading to suberect, coriaceous, narrowly ovate, acute, basally rounded, shallowly cordate and sessile leaf that blooms at most any time of the year on a short, arising through a spathe with the flower lying against the center of the leaf [prostrate], single, successive flowered inflorescence with a tubular, shorter than the pedicel floral bract.

This species is related to P cubitoria restricted to southern Ecuador and P tamaensis which is restricted to Venezuela. This one is distinguished by a shorter dorsal sepal, shorter lip and shorter petals

Synonyms Acronia microcardia (Rchb.f.) Luer 2005; Humboldtia microcardia (Rchb.f.) Kuntze 1891; Pleurothallis chachatoynsis Schltr. 1924; Pleurothallis cundinamarcae Schltr. 1921; Pleurothallis stenosepala Rolfe 1892

References W3 Tropicos, Kew Monocot list , IPNI ;

* Bonplandia (Hannover) 3: 72 Rchb.f 1855;

Bull. Misc. Inform. Kew 1892: 208 Rolfe 1892;

Notizbl. Bot. Gart. Berlin-Dahlem 7: 528 Schlechter 1921 as P cundinamarca;

Beitrage Zur Orchideenkunde Von Colombia 27:45 Schlechter 1924 as P chachatoynsis;

Venezuelan Orchids Vol 5 Dunsterville & Garay 1966 as P stenosepala;

AOS Bulletin Vol 48 No 10 1979 photo as P stenosepala;

Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P stenosepala drawing fide;

Icones Planetarum Tropicarum Plate 580 Vasquez & Dodson 1989 drawing as P stenosepala hmm;

Native Colombian Orchids Vol 3 COS 1991 as P stenosepala photo good;

Native Colombian Orchids Vol 6 COS 1998 photo not;

Native Ecuadorian Orchids Vol 4 Dodson 2003 photo fide;

Orquideas Nativas del Tachira Cesar Fernandez 2003 as P stenosepala photo fide;

Icones Pleurothallidinarum Vol XXVII Systematics of Dryadella Systematics of Macrophyllae-Fasciculatae Luer 2005 as Acronia microcardia

Icones Pleurothallidinarum Vol XXVII Systematics of Dryadella Systematics of Macrophyllae-Fasciculatae Luer 2005 as Acronia microcardia drawings fide;

Las Orquideas del Peru Izerskyy & Bezverhov 2011 as Acronia microcardia photo fide;

Orquideas de Farallones de Cali Galindo-Tarazona, Haelterman, Zuluaga Trochez and Sebastian Moreno 2020 photo fide

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