Report from the Oak ICRA checklist
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Full Name: - Quercus robur (Fastigiata Group) 'Skymaster'

Quercus robur (Fastigiata Group) 'Skymaster' J. F. Schmidt III, Bull. Am. Assoc. Bot. Gard. Arb., 15(3): 69 (1981) Cultivar name has been accepted as Registered
Infrageneric Classification
Subgenus Quercus, section Quercus (the white oaks)
Nomenclature Note
US Patent granted to Milton Baron on 22nd April, 1975 without a designated name. Patent assigned to J. Frank Schmidt & Son Co., Oregon, USA. Registered cultivar name, See AABGA Bul. 15: 69 (1981). Sometimes seen as a trademark, but this status cannot be maintained due to prior use.
A photographic image of the patent documentation may be downloaded (for which you will need a TIFF reader on your computer).
Nomenclatural Standard
United States Plant Patent PP 3707
Synonyms in this Database
Quercus robur 'Pyramich' J. F. Schmidt III nom. illegit.
Main Horticultural References
(Jacobson) North American Landscape Trees, (1996) page 559 treats as trademark
(Dirr) Manual of Woody Landscape Plants, 5th ed. (1998) page 834
Oak Collections Growing this Taxon