Pleurothallis tridentata Klotzsch 1840 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859

Flower Closeup

Photos by Francis J Quesada-Pallares

Another Plant

Photo by S Manning and

Drawing

Drawing by Carl Luer

Drawing of P ionantha

Drawing of P ionantha by Carl Luer

Common Name The Three Toothed Pleurothallis [refers to the leaf apex]

Flower Size .1" [3 mm]

Found in Venezuela, Colombia, Ecuador, Peru? and Bolivia? in rainforests at elevations of 400 to 2000 meters as a mini-miniature to small sized, hot to cool growing, caespitose epiphyte with slender, erect to ascending ramicauls enveloped by a close, tubular sheath below the middle and another at the base and carrying a fascile of single, apical, suberect to spreading, coriaceous, narrowly ovate, acute, rounded, shallowly cordate, sessile leaf that blooms at most any time of the year on a short subtended by a spathe, .04 to .08" [1 to 2 mm] long, successively single, few flowered inflorescence with a shorter than the pedicel floral bract and carrying a non-resupinate flower.

"Characterized by the slender ramicauls and ovate to narrowly ovate, acute leaves that are shallowly cordate at the base and a small, usually but not always non-resupinate flower. The middle sepal and synsepal are obtuse and the petals are narrow and acute. The lip is broadly ovoid and concave both above and below a transverse thickening below the middle. Sometimes a glenion is visible on the transverse thickening." Luer 2005

Synonyms Acronia tridentata (Klotzsch) Luer 2005; Humboldtia tridentata (Klotzsch) Kuntze 1891; Pleurothallis ionantha Rchb.f. 1850; Pleurothallis nephrocardia Schltr. 1919; Zosterophyllanthos ionanthus (Rchb.f.) Szlach. & Marg. 2001; Zosterophyllanthos nephrocardius (Schltr.) Szlach. & Marg. 2001; Zosterophyllanthos tridentatus (Klotzsch) Szlach. & Marg. 2001

References W3 Tropicos, Kew Monocot list , IPNI ;

* Allg. Gartenzeitung 8: 287 Klotzsch 1840

Xenia Orchidaceae Vol 3 Reichenbach 1896 drawing fide;

Die Orchideen der Sudamerikanischen Kordillerenstaaten I Venezuela Schlechter 1919 as P nephrocardia;

Venezuelan Orchids Illustrated Vol 1 Dunsterville & Garay 1959 as Pleurothallis ionantha drawing fide to the third photo;

Orchids of Peru Vol 2 Schweinfurth 1959;

Venezuela Orchids Illustrated Vol 2 Dunsterville & Garay 1961 drawing fide;

Venezuelan Orchids Vol 4 Dunsterville & Garay 1966 as Pleurothallis nephrocardia drawing fide;

AOS Bulletin Vol 36 #9 1967 as P ionantha;

AOS Bulletin Vol 36 #9 1967 as P nephrocardia;

Flora Of Venezuela Volumen XV Parte 2 Foldats 1970 drawing fide;

Selbyana 1: 256 Luer 1975 as P nephrocardia Drawing fide;

Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P ionantha drawing fide to the third photo;

Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P nephrocardia drawing fide;

Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 drawing fide;

Miniature Orchids Northen 1980 photo ok;

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

Orchids of Venezuela [An illustrated field guide] Vol. 3 Ramiro and Carnevali 2000 as P ionantha drawing fide to the third photo;

Orchids of Venezuela [An illustrated field guide] Vol. 3 Ramiro and Carnevali 2000 as P nephrocardia drawing fide to the 1 and 2nd photos;

Orchids of Venezuela [An illustrated field guide] Vol. 3 Ramiro and Carnevali 2000 drawing fide;

Orchids of Bolivia Vol 1 Ibisch & Vasquez 2000;

Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003;

Icones Pleurothalidinarum vol XXVII Acronia Luer 2005 drawing fide as Acronia tridentata;

Mille et Une Mini Orchideees Roguenant 2009 photo good;

AOS Bulletin Vol 85 #12 2016 photo fide;

Lankesteriana 18: 217-230 Wilson, Zhao etal 2018 photo fide

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