Oncidium caldense Rchb.f. 1850 SECTION Synsepala Photo courtesy of Photo by Americo Docha Neto and Orchidstudium

Part shade Cool LATE Summer Fall

Common Name The Calda Oncidium [The Pocos de Caldas Oncidium - A town in SW Minas Gerais]

Flower Size .5 to .6" [1.25 to 1.4 cm]

Found in southern Minas Gerais state of Brazil in grassy swamps of bauxite summits as a medium sized, cool growing terretrial with ovate, laterally compressed, longitudinally grooved pseudobulbs with imbricate, deciduous sheaths and carrying 2, stiff, narrowly linear, acute gradually narrowing below into the strongly keeled base leaves that blooms in the late summer and fall on an axillary, to 35" [to 90 cm] long, many flowered, paniculate inflorescence and each branch 4 to 5" [10 to 12 cm] apart and several flowered with all the flowers held towards the apex

My Brazilian friends have sent in the difference between this and O ramosum with which the name O caldense is a synonym. Looks pretty different to me so I have them apart

The O batemannianum complex includes O blanchettii, O caldense, O paranapiacabense; O pontagrossense and newer references refer them all as synonyms of a very variable O batemannianum. I have left them and their synonyms separate for now.

Synonyms Ampliglossum sellowii (Cogn.) Campacci 2006; Coppensia caldensis (Rchb.f.) Docha Neto 2006; Coppensia sellowii (Cogn.) Campacci 2006; Gomesa caldensis (Rchb.f.) M.W.Chase & N.H.Williams 2009; Gomesa sellowii (Cogn.) M.W.Chase & N.H.Williams 2009; Oncidium proliferum Rchb.f. ex Kraenzl.1922; Oncidium sellowii Cogn. 1906

References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O sellowii; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O proliferum; Orchid Digest Vol 44 No 4 1980 photo fide; Orchid Digest Vol 46 No 3 1982 photo fide; Orchid Species Culture Odontoglossum/Oncidium Alliance Bakers 2006 as O sellowii; AOS Bulletin Vol 76 No 8 2007 photo as Coppensia caldensis; Oncidium Vol 3 Koniger 2007 photo/drawing; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Coppensia ramosa photo fide

--------------------------------------------------------------------------------------------------------------------------