Report from the Oak ICRA checklist
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Full Name: - Quercus shumardii 'Royal Flush'

Quercus shumardii 'Royal Flush' J. F. Schmidt III, Bull. Am. Assoc. Bot. Gard. Arb., 15(3): 70 (1981) Cultivar name has been accepted as Registered
Infrageneric Classification
Subgenus Quercus, section Lobatae (the red oaks)
Nomenclature Note
US Patent granted to J. Frank Schmidt III on 15th November, 1977 without a designated name. Registered cultivar name, See AABGA Bul. 15: 69 (1981)
Description may be found in the on-line patent documentation
Alternatively photographic image of the patent documentation may be downloaded (for which you will need a TIFF reader on your computer).
Nomenclatural Standard (Cultivar) or Type
United States Plant Patent PP 4149
Main Horticultural References
(Jacobson) North American Landscape Trees, (1996) page 561