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

Another Flower? Photo by Pieter C Brouwer

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 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 successively single flowered inflorescence with the peduncle concealed by the reclining spathe and has tubular floral bracts.

Characterized by the cordate leaves, a 5 veined dorsal sepal, oblong, single veined glabrous petals and an entirem ovate, obtuse lip with a tiny glenion.

CAUTION The second photo above by Peter Brouwer is of another similar species, as to what I am still not sure but it differs in the 3 veined dorsal and 4 veined synsepal as well as the deep central line on the lip

Similar species are what has been known as P antonensis and P matudana from which this one is separated by its 5 veined dorsal sepala nd 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; 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 Planetarum Tropicarum Plate 1381 Atwood 1989 as P nemorum drawing ok; Icones Pleurothallidinarum Vol XXVII Luer 2005 drawing fide 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

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