Pleurothallis radula Luer 1979 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859
Photo by © Franco Pupulin
Photo by © Daniel Jimenez and his Costa Rican Orchid Photo Flickr site
TYPE Drawing by © Carl Luer
Common Name or Meaning The Raspy Pleurothallis [refers to the verrucose lip]
Flower Size .2" [4 mm]
Found in Cartago province of Costa Rica in forests at elevations around 1500 to 1900 meters as a small sized, cool growing, caespitose terrestrial with slender, erect ramicauls enveloped by a close tubular sheth below the middle and 2 to 3 others at the base and carrying a single, apical, suberect to horizontal, coriaceous, narrowly ovate, acute deeply cordate and sessile base leaf that blooms in the winter on an erect, arising through an erect spathe with the peduncle concealed within, short, fascile of successively erect, resupinate, single flowered inflorescence with thin tubular, much shorter than the pedicel floral bracts.
The species is characterized by the horizontal, narrowly cordate leaf with an erect, conspicuous spathe giving rise to single yellow flowers with acute and similar dorsal sepal and synsepal, the petals are serrate and reflexed and the lip is coarsly verrucose.
Synonyms Acronia radula (Luer) Luer 2005; Zosterophyllanthos radula (Luer) Szlach. & Marg. 2001;
References W3 Tropicos, Kew Monocot list , IPNI ;
Icones Pleurothallidinarum Vol III Systematics of Pleurothallis Luer 1986;
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 2005 as Acronia radula
Icones Pleurothallidinarum Vol XXVII Systematics of Dryadella Systematics of Macrophyllae-Fasciculatae Luer 2005 as Acronia radula drawing fide;
Orchids of Costa Rica Vol 5 Morales 2009 photo fide;
LANKESTERIANA 17(2) Pupulin, J.Aguilar & M.Díaz 2017 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;
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