Report from the Oak ICRA checklist
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Full Name: - Quercus ×macdonaldii

Quercus ×macdonaldii Greene & Kellogg (1889)
Infrageneric Classification
Subgenus Quercus, Section Quercus
Q. lobata Née × Q. pacifica Nixon & C. H. Mull.
Common Names in this Database
See: Nixon, Volume 3 of Flora of North America (1997) Page 489
Natural Distribution
USA: (California: Santa Catalina Isle, Santa Cruz Isle, Santa Rosa Isle)
Illustration of Leaves
Image from a plant at Rancho Santa Ana Botanic Garden (USA) ©Jan De Langhe, Ghent University Botanical Garden, 2011
Main Horticultural References
Hortus Third (1976) page 934 as a species
Recent Monograph References
(Miller & Lamb) Oaks of North America (1985) page 296 mentions as Q. dumosa × Q. engelmannii
(Hardÿ & Lamant) Guide illustré des Chênes (2006) Volume 2, page 338