Sigmatostalix adamsii Dodson 1977 Photo by Eric Hunt and his Flicker Orchid Photostream

Another Inflorescence Photo by Jay Pfahl

Another Form Photos by Lourens Grobler

Part shade Hot to WarmWinter to Spring

Common Name Adams Sigmatostalix

Flower Size 1/16" [.15 cm]

Found in Western Ecuador and Costa Rica? in orange and Guava trees in montane cloudforests at elevations of 100 to 1250 meters [yet most common between 400 to 900 meters] as a small sized, hot to warm growing epiphyte with a rhizome carrying closely spaces growths made up of narrowly egg-shaped, compressed pseudobulbs with 2 sharp edges and basally enveloped by several distichous, overlapping, longitudinally folded sheaths with the upper most few carryiong leaf like blades and carrying an apical, single, narrowly linear to strap shaped, acute leaf that blooms in the winter and spring on a slender, erect to arching, 7.5" [19 cm] long, many flowered, paniculate inflorescence arising on a newly matured pseudobulb from with in the leaf axil

Synonyms Oncidium adamsii [Dodson] Chase & Wms 2008

References W3 Tropicos, Kew Monocot list , Icones Planetarum Tropicarum Plate 300 Dodson 1980 drawing fide; Orchids from The Coast Of Ecuador Arosemana, Jurado, Estrada and Konanz 1988 photo not; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1999 drawing fide; Native Ecuadorian Orchids Vol 5 Dodson 2004 drawing fide/photo ok; Orchid Species Culture Oncidium/Odontoglossum Alliance Bakers 2006; AOS Bulletin Vol 77 No 12 2008 as Oncidium adamsii; AOS Bulletin Vol 85 #8 2016 photo fide;