Pleurothallis hirsuta Ames 1908 SUBGENUS Effusae Luer 2000
Photo by © Arturo Carillo
Photo by Dale and Deni Borders.
HOLOTYPE Drawing by © Oakes Ames
to
MOSTLY 
Common Name The Shaggy Pleurothallis
Flower Size about 1/2" [6 to 12 mm]
Found in Jalisco, Michoacan, Guerrero, Mexico and Morelos states of Mexico as a miniature to small, cool to cold growing,caespitose epiphyte around elevations of 1800 to 2600 meters with slender, terete ramicauls that become triangular in cross-section above and are enveloped basally by a few scarious sheaths and carrying a single, apical, elliptic, obtuse and emarginate apically, keeled near the base abaxially sessile at the base leaf and blooms on an apical, fractiflex, 6" [15 cm] long, few flowered inflorescence arising through a small spathe and is longer than the leaf and has successive opening flowers occuring at any time of the year but especially winter.
Said by most references to be a synonym of P villosa but I feel there are many differences that should keep them separate. I await more information.
Synonyms
References W3 Tropicos, Kew Monocot list , IPNI ;
*Studies in the Family Orchidaceae Fascile 2:270 Ames 1908 drawing fide;
Orchids of Guatemala and Belize Ames & Correll 1952;
Encyclopedia of Cultivated Orchids Hawkes 1965 photo good;
Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide;
Miniature Orchids Northen 1980;
Las Orquideas de El Salvador Vol 3 Hamer 1981 drawing ok;
Flora Novo-Galaciana Vol 16 Orchidaceae Mc Vaugh 1985 drawing fide;
Icones Pleurothallidianrum Vol III Systematics of Pleurothallis Luer 1986;
An Introdution to the Orchids of Mexico Wiard 1987 photo fide;
Guatemala Y Sus Orquideas Behar & Tinschert 1998 photo fide;
Icones Pleurothallidinarum Vol XX Systematics of Jostia, Andinia, Barbosella, Barbrodia & Pleurothallis subgen Antilla, Effusia and Restrepioidia Luer 2000 as syn of P villosa
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