Pleurothallis compressa Luer 1996 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciclatae Lindl. 1859

Photos by © Walter Schug

Flower Closeup

Photo courtesy of Daniel Jimenez ©

Drawing

TYPE Drawing by Carl Luer

Part ShadeCool Spring

Common Name The Compressed Pleurothallis [refers to the laterally compressed ramicaul]

Flower Size .2" [5mm]

Found in Cartago province of Costa Rica at elevations around 1500 meters as a miniature to small sized, cool growing, caespitose epiphyte with slender, erect, sharply compressed ramicauls with a sheath in the lower 1/3 and 2 at the base and deccurrent into the deflexed, single, coriaceous, concave, ovate, acuminate to the acute apex, abruptly narrowing below into the shallowly cordate base leaf that blooms in the spring on a short, arising through a suberect spathe, peduncle thick, .04 to .08" [1 to 2 mm] long, deep within the spathe, fascile of successive single flowers with tubular, half as long as the ovary floral bracts.

Part of the Pleurothallis cardiostola/Pleurothallis lilijae complex. Set apart from others in the section by the sharply compressed ramicauls carrying a deflexed leaf that is decurrent for a least one centimeter somewhat like some species within the section Ancipita. It also has small brown flowers protruding from the spathe and face downward. The sides of the dorsal sepal and synsepal as well as the subfalcate petals are reflexed. Lastly the triangular lip has a pyramidical callus fit beneath the column withn the glenion and the viscidium in apposition.

Synonyms Acronia compressa [Luer]Luer 2005; Zosterophyllanthos compressus (Luer) Szlach. & Kulak 2006

References W3 Tropicos, Kew Monocot list , IPNI ; Lankester's Epidendra Website CR ;

* Lindleyana 11(2): 75 Luer 1996 Drawing fide;

Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003;

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

Icones Pleurothallidinarum Vol XXVII Systematics of Dryadella Systematics of Macrophyllae-Fasciculatae Luer 2005as Acronia compressa drawing fide; Orchids of Costa Rica Vol 5 Morales 2009 photo fide; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 photo fide;

Harvard Papers in Botany Vol. 26, No. 1 2021, The Researchgate Website photo/drawing 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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