Pleurothallis angustisepala Ames & Correll 1942 SUBGENUS Acianthera [Scheidw.] Luer 1986

Photo by Jay Pfahl

Plant and Flowers

Photo by Patricia Harding

Flower Closeup

Photo by Arturo Carillo


Drawing by Carl Luer

Common Name or Meaning The Narrow Sepal Pleurothallis

Flower Size 3/8" [8mm]

Found from Chiapas state of Mexico, Belize and Alta Verapaz department of Guatemala on the gulf slope in wet montane rainforests and elfin forests at elevations of 800 to 1350 meters as a miniature to small sized, warm to cool growing, caespitose epiphyte with slender, with 2 internodes, dilated and slightly compressed towards the apex ramicaule enveloped basally by tubular, funnel-shaped sheath and carrying a single, apical, arcuate to pendant, sessile, oblong-elliptic to lanceolate, acuminate apically, gradually narrows below into the elongate, petiolate base leaf that blooms in the fall on a fascile of simultaneous, 5 to 10 flowered inflorescence with almost as long as the ovary floral bracts and holding the distichous flowers close to the apex of the ramicaul.

"Characterized by the pedent habit, ramicauls considerably shorter than the hanging leaves, and mostly concealed by a loose sheath. The leaves are narrowly ovate with thin, sharp, purple margins. The flowers are produces in a short, congested raceme. The dorsal sepal is very narrow and attenuate, the suynsepal, bifid above the middle, forms a broad mentum at the base, the petals are serrate and the ovate lip is spiculate-verrucose with a pair of small, erect, lateral lobes on the lower fourth." Luer 2004

Synonyms Acianthera angustisepala (Ames & Correll) Pridgeon & M.W.Chase 2001

References W3 Tropicos, Kew Monocot list , IPNI ;

* Bot. Mus. Leafl. 10(4): 74-75, t. 6 Ames & Correll 1942;

Orchids of Guatemala and Belize Ames & Correll 1952 drawing fide;

Icones Pleurothallidinarum Vol III Systematics of Pleurothallis Luer 1986;

Lindleyana Vol 16 No 4:242 Pridgeon & M.W.Chase 2001 as Acianthera angustisepala;

Icones Orchidacearum 5 & 6 Orchids Of Mexico Parts 2 & 3 Plate 501 Hagsater, Soto 2003 as Acianthera angustisepala drawing fide;

Icones Pleurothallidinarum Vol XXVI Pleurothallis subgenus Acianthera and Three Allied subgenera, A Second Century of new Species of Stelis of Ecuador, Epibator, Ophidion and Zootrophion Luer 2004

Icones Pleurothallidinarum Vol XXVI Pleurothallis subgenus Acianthera aand Three Allied subgenera, A Second Century of new Species of Stelis of Ecuador, Epibator, Ophidion and Zootrophion Luer 2004 Drawing fide;

Orchids of Mexico Hagsater, Soto, Salazar, Jimenez Lopez & Dressler 2005 as Acianthera angustisepala;

AOS Bulletin Vol 75 No 5 2006 photo;

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 angustisepala photo fide;

Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018 as Acianthera angustisepala;

Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 as Acianthera angustisepala photo fide