Pleurothallis homalantha Schltr.1923 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859

Photo by Franco Pupulin and the Epidendra Website

Drawing

Drawing by Carl Luer

Full shade Cool Winter

Common Name The Flat Smooth Flowered Pleurothallis

Flower Size .2" [5 mm]

Found in El Salvador, Honduras, Nicaragua, Costa Rica, Panama and Brazil at elevations of 1150 to 1900 meters as a small sized, cool growing, caespitose epiphyte with slender, erect ramicauls enveloped by a tubular sheath below the middle and 2 others at the base and carrying a single, apical, horizontal, coriaceous, ovate, acute, sessile and cordate base leaf that blooms in the winter on a reclining, with the .24 to .28" [6 to 7 mm] long, peduncle concealed by the reclining spathe, successively single flowered inflorescence with a tubular, shorter than the pedicel floral bracts.

Characterized by the cordate leaves, a 5 veined dorsal sepal, oblong, single veined glabrous petals and an entire ovate, obtuse lip with a tiny glenion. The 5 veined dorsal sepal distinguishes it from P antonensis

Similar species are what has been known as P antonensis and P matudana from which this one is separated by its 5 veined dorsal sepal and the 6 veined synsepal.

Synonyms Acronia homalantha (Schltr.) Luer 2005; Pleurothallis homalanthoides Schltr. 1923; Pleurothallis nemorum Schltr. 1923; Pleurothallis nervosa Braid 1924; Zosterophyllanthos homalanthus (Schltr.) Szlach. & Marg. 2001

References W3 Tropicos, Kew Monocot list , IPNI ;

* Repert. Spec. Nov. Regni Veg. Beih. 19: 106 Schlechter 1923;

Repert. Spec. Nov. Regni Veg. Beih. 19: 190 Schltr. 1923 as Pleurothallis homalanthoides ;

Repert. Spec. Nov. Regni Veg. Beih. 19: 191 Schltr. 1923 as P nemorum;

The Orchids of Panama L.O. Williams & P Allen 1946;

Las Orquideas de El Salvador Vol 2 Hamer 1974 drawing not correct, actually P matudana photo hmm;

Las Orquedias De El Salvador Vol 2 Hamer 1974 as P matudana drawing/photo not = P homalantha fide;

Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing ok;

Icones Planetarum Tropicarum Plate 1255 Hamer 1985 as P nemorum drawing good;

Icones Pleurothallidinarum Vol III Systematics of Pleurothallis Luer 1986;

Icones Planetarum Tropicarum Plate 1381 Atwood 1989 as P nemorum drawing ok;

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 homalantha

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

Orchids of Mexico Hagsater, Soto, Salazar, Jimenez Lopez & Dressler 2005 as P aff homalantha photo not;

Orchids of Costa Rica Vol 2 Morales 2009 photo fide; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 photo fide

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