Cyrtochilum serratum (Lindl.) Kraenzl.1917 SECTION Eucyrtochilum Kranzlin
Photo by © Pieter C. Brouwer and his Nature Photo Website
Photos by Danny Lentz, plant grown by Atlanta Botanical Garden
Photos by Patricia Harding
to 
Common Name The Saw Edged-Flower Cyrtochilum
Flower Size 3" [7.5 cm] long
Found in western Ecuador and Peru in montane cloud forests at elevations of 1300 to 3300 meters as a large sized, cold to cool growing epiphyte or terrestrial on steep cliff faces with oblong-ovoid, compressed pseudobulbs carrying 2, apical, narrowly linear-oblanceolate, acute leaves that blooms in the winter on an axillary, arcuate, 5 to 9' [150 to 270 cm] long, flexuous, racemose to paniculate, branches relatively short, fractiflex, 3 to 6 flowered each branch, many flowered inflorescence arising from the leaf sheath on a mature pseudobulb and has ovate-oblong, strongly concave, more or less blunt tipped floral bracts carrying wide-spreading flowers.
Synonyms Oncidium diadema Lindley 1866; *Oncidium serratum Lindley 1842
References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915 as Oncidium serratum; Atlas des Orchidees Cultivees Constantin 1920 as Oncidium serratum drawing fide; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922; AOS Bulletin Vol 28 No 2 1959 as Oncidium serratum photo fide; Orchids of Peru Vol 4 Schweinfurth 1961 as Onciduimk serratum; Encyclopedia of Cultivated Orchids Hawkes 1965 as Oncidium serratum; Orchid Digest Vol 38 no 5 1974 as Oncidium serratum photo fide; Icones Planetarum Tropicarum plate 189 Dodson 1980 Oncidium serratum drawing fide; Orchids Travel By Air A Pictoral Safari Mulder, Mulder-Roelfsema and Schuiteman 1990 as Oncidium serratum photo fide; Orchid Digest Vol 60 No 2 1996 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; AOS Bulletin Vol 67 No 1 1998 photo ok; Lindleyana Vol 16 No 2 2001; The Pictoral Encyclopedia of Oncidium Zelenko 2002 drawing fide; Native Ecuadorian Orchids Vol 4 Dodson 2003 as Oncidium serratum drawing fide/photo ok; AOS Bulletin Vol 73 No 3 2004; AOS Bulletin Vol 74 No 10 2005 photo fide; Orchid Species Culture: Oncidium/Odontoglossum alliance Bakers 2006; Orchid Species of Peru Zelenko Bermudez 2009 photo fide; Flora of Ecuador No 87 225[3] Orchidaceae Dodson & Luer 2010 drawing fide; Orchid Digest Vol 75 #4 2011 Photo fide; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 drawing/photo fide
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