Pleurothallis circumplexa Lindl. 1838 SUBGENUS Acianthera SECTION Sicariae SUBSECTION Sicariae Luer 1986 Photo by © Weyman Bussey

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Common Name The Clasping Pleurothallis

Flower Size to 1/4" [7mm]

Found from Mexico, Guatemala, El Salvador, Honduras, Nicaragua and Costa Rica in high elevation cloud forests as a small sized, warm to cold growing epiphyte that occurs at altitudes of 2000 to 2200 meters with a triangular, sulcate ramicaul carrying a single, apical, fleshy, elliptical, retuse apically, grey-green leaf that gradually becomes conduplicate into a long sinus and blooms in the spring and summer on a short, fasciculate, to 1" [2.5 cm] long, few flowered inflorescence arising from the midvein below the middle of the leaf and holding the flowers close to the leaf.

Synonyms Acianthera circumplexa (Lindl.) Pridgeon & M.W.Chase 2001; Humboldtia circumplexa (Lindl.) Kuntze ?; Humboltia circumplexa (Lindl.) Kuntze 1891; Pleurothallis mesophylla A. Rich. & Galeotti 1845

References W3 Tropicos, Kew Monocot list , IPNI ; Orchids of Guatemala and Belize Ames & Correll 1952; Encyclopedia of Cultivated Orchids Hawkes 1965; Las Orquideas De El Salvador Vol 2 Hamer 1974 drawing/photo fide; AOS Bulletin Vol 48 No 5 1979; Orquídea (Mexico City), n.s., 7[3]: 1979; Las Orquideas de El Salvador Vol 3 Hamer 1981 drawing ok; Icones Planetarum Tropicarum plate 1090 Dodson 1984 drawing lip not right; Icones Pleurothallidinarum Systematics of Pleurothallis Vol 3 Luer 1986; An Introdution to the Orchids of Mexico Wiard 1987 photo fide; AOS Bulletin Vol 67 No 7 1998 photo fide; Guatemala Y Sus Orquideas Behar & Tinschert 1998 photo fide; Lindleyana Vol 16 No 4 2001 as Acianthera circumplexa; Icones Orchidacearum 5 & 6 Orchids Of Mexico Parts 2 & 3 Plate 504 Hagsater, Soto 2002 as Acianthera circumplexa drawing good; Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003; Icones Pleurothallidinarum Vol XXVI Luer 2004 drawing fide; Vanishing Beauty, Native Costa Rican Orchids Vol 1 Pupulin 2005 as Acianthera circumplexa phots fide; Orchids of Costa Rica Vol 5 Morales 2009 photo fide; Mille et Une Mini Orchideees Roguenant 2009 as Acianthera circumplexa photo fide; Guia de Orquideas de Chiapas Carlos Rommel Beutelspacher Baigts 2013 as Acianthera circumplexa photo fide; Algunas Orquideas de Mexico Tomo 1 Suarez 2013 as Acianthera circumplexa photo fide; Diversity of Pleurothallidinae in Guatemala: An Endangered Orchid Subtribe with High Economic and Horticultural Potentials Edgar Mo Mo, Cetzal, Basu and Vega 2017 as Acianthera circumplexa photo fide; Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018 as Acianthera circumplexa Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 as Acianthera circumplexa photo fide