Pleurothallis macrorhiza Lindl. 1834 SUBGENUS Xenion

Plant and Flowers

Photos by Ecuagenera and their Ecuador Orchid Website

Drawing

Drawing by Carl Luer

THROUGH

Common Name The Big Rhizome Pleurothallis

Flower Size .4" [1 cm]

Found in Cauca department of Colombia, Azuay, Morona-Santiago, Chimborazo, and Pichincha provinces of Ecuador andAncash, Chiclayo, Chichapalca and Piura departments of Peru in very wet, montane cloud forests at elevations of 1800 to 3200 meters as a small sized, cool to cold growing, repent epiphyte with a stout, ascending-erect ramicauls enveloped by 2 to 3 loose, tubular sheaths and carrying a single, apical, erect, thickly coriaceous, narrowly elliptical, acute to subacute, narrowing below into the ill-defined petiolate base leaf that blooms in the spring through fall on 1 to 3, slender, 2" [5 cm] long, loose, successively single, few flowered inflorescence with a shorter than the pedicel to longer than the ovary floral bract.

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Synonyms Andinia spiralis (Ruiz & Pav.) Karremans & Mark Wilson 2017; Humboldtia macrorhiza (Lindl.) Kuntze 1891; *Humboldtia spiralis Ruiz & Pav. 1798; Pleurothallis spiralis (Ruiz & Pav.) Lind. 1830; Xenosia macrorhiza (Lindl.) Luer 2006; Stelis spiralis (Ruiz & Pav.) Pers. 1807; Xenosia spiralis (Ruiz & Pav.) Luer 2004

References W3 Tropicos, Kew Monocot list , IPNI ;

* J. Bot. (Hooker) 1: 9 Lindley 1834

Selbyana 1: 294 Luer 1975 as Pleurothallis spiralis drawing fide

Die Orchideen der Sudamerikanischen Kordillerenstaaten III Ecuador Schlechter 1921 as P rhizomatosa;

Orchids of Peru Vol 1 Schweinfurth 1958 as Stelis spiralis;

Orchids of Peru Vol 2 Schweinfurth 1959;

Icones Pleurothallidinarum Vol III Systematics of Pleurothallis Luer 1986 as P spiralis;

Icones Orchidacearum Peruviarum Plate 166 Bennett & Christenson 1993 as Pleurothallis spiralis 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 as Xenosia spiralis;

Icones Pleurothallidianrum Vol XXVIII A Reconsideration of Masdevallia Systemtics of Specklinia Luer 2006 as Xenosia macrorhiza

Icones Pleurothallidianrum Vol XXVIII A Reconsideration of Masdevallia Systemtics of Specklinia Luer 2006 as Xenosia macrorhiza drawing fide;

Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 as Andinia spiralis photo fide

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