Pleurothallis johnsonii Ames 1923 SUBGENUS Acianthera SECTION Brachystachyae Lindley 1859

Photo by Eric Hunt

Another View

Photo by Weyman Bussey

Another Flower? in Costa Rica

Plant and Flowers ?in situ Costa Rica

Photo by Daniel Jimenez

Another Flower form? Photos by Mario Velasquez and his Flickr Orchid Photo Website

Common Name Johnson's Pleurothallis [American Original Collector of species 1900's]

Flower Size 3/4" wide [2 cm]

Found in Mexico, Guatemala, El Salvador, Honduras, Costa Rica and Panama in primary and secondary pine/oak forests at elevations of 1000 to 2450 meters as a medium sized, warm growing litho-terrestrial on road cuts and cliffs with terete, 3 to 4 noded ramicauls enveloped completely by imbricating, laterally compressed sheaths and carrying a single, apical, erect, elliptic to oblong-elliptic, acute, gradually narrows below into the conduplicate base leaf that flowers in the summer and fall on a basal, creeeping, racemose, 2" [5 cm] long, 5 to 7 flowered infloresence carrying foul smelling flowers.

CAUTION I feel the first 2 photos are correct the thiord and fourth variety featured above are not a very good fit to the references, the third photo is taken in Costa Rica and is good for plant and inflorescence form and has the described colors but the long pubescence on the outer surfaces of the sepals is not described. The photo by Mario is taken in Guatemala and has the proper plant and inflorescence form but does not have the described colors and has no hairs only callosities on the outer surface of the sepals, Which, if either, is correct I cannot say with the present references available to me.

Synonyms Acianthera johnsonii (Ames) Pridgeon & M.W. Chase 2001; Brenesia costaricensis Schltr. 1923; Brenesia johnsonii (Ames) Luer 2004; Pleurothallis lateralis L.O.Williams 1956

References W3 Tropicos, Kew Monocot list , IPNI ; Repert. Sp. Nov. Regni. Veg. Beih. 19: 200. Costa Rica Schlechter 1923 as Brenesia costaricensis; Orchids of Guatemala and Belize Ames & Correll 1952 Encyclopedia of Cultivated Orchids Hawkes 1965; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing hmm/photo hmm; Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 7 385 - 448 Brieger, Maatsch and Senghas 1975 as Brenesia costaricensis; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing hmm; Systematics of Pleurothallis Vol 3 Luer 1986; Lindleyana Vol 16 No 4 2001 as Acianthera johnsonii; Icones Orchidacearum 5 & 6 Orchids Of Mexico Parts 2 & 3 Plate 509 Hagsater, Soto 2002 as Acianthera johnsonii drawing fide to the first 2 photos; Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003; Australian Orchid Review Vol 69 No 4 2004 photo; Icones Pleurothallidinarum Vol XXVI Luer 2004 as Brenesia johnsonii; Guia de Orquideas de Chiapas Carlos Rommel Beutelspacher Baigts 2013 as Acianthera johnsonii photo fide;