Report from the Oak ICRA checklist
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Full Name: - Quercus palustris 'Pringreen'

Quercus palustris 'Pringreen' W. Flemer III U.S.Plant Patent 9093 (1995) Cultivar name has been accepted as Registered
Infrageneric Classification
Subgenus Quercus, Section Lobatae
Nomenclature Note
US Patent granted to William Flemer III on 28th March, 1995. Patent assigned to Newplant Associates, New Jersey, USA. Marketed under the trademark GREEN PILLAR®
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 9093
Main Horticultural References
(Dirr) Manual of Woody Landscape Plants, 5th ed. (1998) page 827 as 'Green Pillar'