Sigmatostalix unguiculata C. Schweinf. 1940 Photo courtesy of Andy's Orchids Copyright 2002 All rights reserved.

Part shadeWarm to CoolFall to Winter

Common Name The Clawed Sigmatostalix

Flower Size

Found in Costa Rica in evergreen forests at 975 meters as a miniature sized, cool to warm growing epiphyte with elliptic to egg-shaped, strongly compressed pseudobulbs enveloped basally by several pairs of distichous, imbricate, conduplicate leaf-bearing sheaths and carrying a single, apical, linear-oblong to oblong-elliptic, obliquely bilobed and rounded apically, shiny on top and dull below leaf that is conduplicate belwo and forms a petiole-like stem. This speceis blooms on an axillary, short, few flowered inflorescence with the flowers arising only on one side of the stem and arises on a newly matured pseudobulb.

"The long, slender claw of the lip, and the falcate, acute, yellow lateral lobes distinguish this species from its closest relative, S. pseudounguiculata, which presents linear, truncate, white lateral lobes of the lip." Pupuplin 2003

Synonyms Oncidium unguiculoides Chase & Wms. 2008

References W3 Tropicos, Kew Monocot list , IPNI ; Field Guide to the Orchids of Costa Rica and Panama Dressler 1993; Phylogeny and Classification of the Orchid Family Dressler 1993 photo fide; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1999 drawing fide; Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003; Harvard Papers in Botany, Vol. 8, No. 1, pp. 3559 Pupulin 2003 drawing fide; Orchid Species Culture Oncidium/Odontoglossum Alliance Bakers 2006; AOS Bulletin Vol 77 No 12 2008 as Oncidium unguiculoides; Orchid Digest Vol 75 #4 2011 Photo fide; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 as Oncidium unguicualta photo fide