Pleurothallis decurrens Poepp. & Endl. 1836 SUBGENUS Acianthera SECTION Sicariae SUBSECTION Sicariae Luer 1986 Drawing by Lipsiae, Sumptibus Friderici Hofmeister and The Swiss Orchid Foundation at the Jany Renz Herbaria

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Common Name The Downward Running Pleurothallis

Flower Size 1/4" [6mm]

Found in Colombia, Peru and Ecuador in wet montane forests at elevations of 1150 to 2800 meters as a to small sized, warm to cold growing epiphyte with elongate, slender, terete, stiff pseudobulbs enveloped basally by 2 tubular, scarious sheaths, with a single, apical, elliptic, subamplexicaule, acuminate, coriaceous, dark green leaf that blooms in the winter on a fascilee of short [to 3 cm], racemose, few [2 to 4] flowered inflorescence arising from a small spathe, and lays laxly upon the upper leaf surface.

CAUTION This species has been confused with P quadricristata for years and all photos that I have seen of P decurrens are P quadricristata which is a well spaced, brown flower with a narrowly elliptic, obtuse synsepal with a lip that is less than 1/3 of the synsepal in length.

Synonyms Acianthera decurrens (Poepp. & Endl.) Pridgeon & M.W. Chase 2001; Humboldtia decurrens (Poepp. & Endl.) Kuntze 1891; Humboltia decurrens (Poepp. & Endl.) Kuntze 1891

References W3 Tropicos, Kew Monocot list , IPNI ; Icones Pleurothallidinarum Systematics of Pleurothallis Vol 3 Luer 1986; Icones Orchidacearum Peruviarum Plate 744 Bennett & Christenson 2001 drawing fide; Lindleyana Vol 16 No 4 2001 as Acianthera decurrens; Icones Pleurothallidinarum Vol XXVI Luer 2004 drawing ok; Orchid Species of Peru Zelenko Bermudez 2009 photo as Acianthera decurrens not = P quadricristata

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