Pleurothallis microcardia Rchb.f. 1855 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859

Another Flower

Lip Detail in situ Cundinamarca Colombia Aug 2013 Photos by Jay Pfahl

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 single, successive flowered inflorescence arising through a spathe with the flower lying against the center of the leaf [prostrate]

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 Rchb.f 1855; 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 XXVII Dryaldela and Acronia Luer 2005 drawing fide as Acronia microcardia; Las Orquideas del Peru Izerskyy & Bezverhov 2011 as Acronia microcardia photo fide

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