× Oncostele, abbreviated Ons., is a hybrid genus of orchids, used for greges containing at least one ancestor species from the genera Oncidium (Onc.) and Rhynchostele (Rst.).Rees, T. (compiler) (2018). The Interim Register of Marine and Nonmarine Genera. Available from http://www.irmng.org at VLIZ. Accessed 2018-03-20 https://www.gbif.org/species/108447507/verbatim The nothogenus was defined in 2003 by J. M. H. Shaw.J.M.H.Shaw, Orchid Rev. 111(1254, Suppl.): 96 (2003).
Greges Over 500 greges have been registered in × Oncostele.Oncostele, OrchidRoots; http://bluenanta.com/orchid/species/?genus=Oncostele&genustype=hybrid The grex Midnight Miracles has two cultivars, 'Masai Red' and 'Masai Splash', that have gained the Royal Horticultural Society's Award of Garden Merit.
Primary The genus × Oncostele contains the following primary hybrids: Ons. Black Beauty, Santa Barbara (1988) = Rst. bictoniense × Onc. leucochilum Ons. Elske Stolze, L.Stolze (1978) = Onc. sotoanum × Rst. bictoniensis (basionym: Odontocidium) Ons. Feathers, Woodland (2006) = Onc. maculatum × Rst. rossii Ons. Rustic Bridge, Rod McLellan Co. (1981) = Onc. fuscatum × Rst. ureskinneri
Non-primary Ons. Wildcat = Ons. Rustic Bridge × Onc. Crowborough,Oncostele Wildcat, The International Orchid Register, http://apps.rhs.org.uk/horticulturaldatabase/orchidregister/orchiddetails.asp?ID=91626 which has gained the Royal Horticultural Society's Award of Garden Merit.
Formerly Cus. Compadre Juan Manzur, S.Cusi (2007) = Cauc. phalaenopsis (syn. Onc. phalaenopsis) × Rst. rossii
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