Pleurothallis crateriformis C.Schweinf. 1951 SUBGENUS Pleurothallis SECTION Macrophyllae-Fasciculatae Lindl 1859

Photo by Lynn O'Shaughnessy

Leaf and Flower

TYPE Drawing

TYPE Drawing by Schweinfurth and The Epidendra Orchid Website

Drawing

TYPE Drawing by Carl Luer

Common Name The Cratered Pleurothallis [refers to the concave lip]

Flower Size .4" [1 cm]

Found in Morona-Santiago, Azuay and Zamora-Chinchipe provinces of Ecuador and Junin department of Peru at elevations of 2000 to 2700 meters as a small sized, cold growing, caespitose epiphyte with erect, slender ramicauls enveloped by a close, tubular sheath below the middle and 2 to 3, densely short pubescent basal sheaths and carrying a single, apical, horizontal to spreading, thickly coriaceous, cordate-ovate, acute, deeply cordate into the sesille base leaf that blooms in the fall on a fascile, enveloped by a .32 to .44" [8 to 11 mm] long, reclining spathe, of successive, single flowered inflorescence with a shorter than the pedicel floral bract and carrying resupinate flowers.

Differs in the thickly coriaceous, deeply cordate leaves and s fleshy dark colored, gaping flower that sits upon the leaf. The sepals are verrucose within and the thick ovoid lip is deeply concave centrally with the margins flattened and cellular-gladular. The dorsal sepal is much broader than the lamina of the fused lateral sepals and the deeply concave or bowl-shaped lip. Similar to P tobarii and P muriculata in the pubescent or hispidous sheaths of the ramicauls which is a rare occurence within the section Macrophyllae-Fasciculatae.

Synonyms Acronia crateriformis (C.Schweinf.) Luer 2005, Zosterophyllanthos crateriformis (C.Schweinf.) Szlach. & Kulak 2006

References W3 Tropicos, Kew Monocot list , IPNI ;

* Bot. Mus. Leafl. 15: 88 C. Schweinf. 1951 Drawing fide;

Icones Pleurothallidinarum Vol XXVII Systematics of Dryadella Systematics of Macrophyllae-Fasciculatae Luer 2005;

Icones Pleurothallidinarum Vol XXVII Systematics of Dryadella Systematics of Macrophyllae-Fasciculatae Luer 2005 drawing fide;

AOS Bulletin Vol 76 No 9 2007 as Acronia craterformis photo fide

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