Report from the Oak ICRA checklist
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Full Name: - Quercus alba Pinnatifida Group

Quercus alba Pinnatifida Group Michx., Hist. Chênes Amer., t. 5, fig. 4 (1801) as "Q. alba var. pinnatifida" Cultivar name has been accepted as Registered
Infrageneric Classification
Subgenus Quercus, section Quercus (the white oaks)
Main Horticultural References
(Krüssmann) Manual of Cultivated Broad-leaved Trees & Shrubs (in English) vol. 3 (1986) page 81 as forma pinnatifida (Michx.) Rehd.
The New Royal Horticultural Society Dictionary of Gardening vol. 3 (1992) page 770 treats as f. pinnatifida (Michx.) Rehd.