Pleurothallis dilemma Luer 2001 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859

Leaf and Flower

Photos by © Jay Pfahl, Cundinamarca Colombia 2900 meters 10/2020

Flower Closeup

Photos courtesy of Lourens Grobler ©.

Plant and Flowers

Photo by © Linda & Mikael Karlbom

TYPE Drawing

TYPE Drawing by © Carl Luer

Common Name The Dilemma Pleurothallis [an allusion the the basally two-horned leaf]

Flower Size .6" [1.5 cm]

Found in Cundinamarca department of Colombia and Zamora-Chinchipe province of Ecuador at elevations of 1800 to 2900 meters as a small sized, cool to cold growing, caespitose epiphyte with slender, erect, ramicauls enveloped basally by 2 close, tubular sheath and another on the lower half and carrying a single, apical, deflexed, thickly rigid, semi-terete, narrowly ovate to sigmoid-ovate, densely short-pubescent, broadly and shallowly channeled to near the apex, acute, basally sessile, deeply forked with semiterete basal lobes, pointing upwards leaf that blooms in the fall on a descending, arising through a reclining spathe at the leaf base, successive single flowered inflorescence with an as long as to just shorter than the pedicel floral bract.

Part of the Pleurothallis cardiostola/Pleurothallis lilijae complex. This one has flowers that are undistinctive in the section but vegetatively this one is unique with mature plants. The very rigid leaves are very three dimensional because they are thickly, acutely defexed away from the ramicaul and are very narrowly cordate basally becoming almost horn-like above the flower nestled at the base below and overall the leaves hang like pea pods.

Synonyms Acronia dilemma (Luer) Luer 2005; Zosterophyllanthos dilemma (Luer) Szlach. & Kulak 2006

References W3 Tropicos, Kew Monocot list , IPNI ;

*Revista Soc. Boliv. Bot. 3: 45 Luer 2001 drawing fide;

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

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

AOS Bulletin Vol 86 #12 2017 photo fide;

Harvard Papers in Botany, Vol. 27, No. 2, 2022, pp. 187–220. © President and Fellows of Harvard College NEW SPECIES OF PLEUROTHALLIS (ORCHIDACEAE)Mark Wilson, Bruno Larsen, Juan Sebastián Moreno, Raven Ward, Joost A. G. Riksen, Luis Piña, Mario A. Sierra-Ariza, Marco M. Jiménez, Milton Rincón-Gonzalez, Robinson Galindo-Tarazona, Henry Garzón Suárez and David Haelterman 2022

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