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Quercus ×macdonaldii
Quercus ×macdonaldii Greene & Kellogg (pro sp.)
Macdonald Oak, Mcdonald Oak
Fagaceae (Beech Family)
Synonym(s): Quercus dumosa var. macdonaldii
USDA Symbol: QUMA4
USDA Native Status: L48 (N)
Small to medium-sized tree with compact, rounded crown, occurring only on California islands.
This rare and local oak is a hybrid between Quercus berberidifolia, California Scrub Oak, and Q. lobata, Valley Oak. It is named for Capt. James M. McDonald, who financed the publication of "Illustrations of West American Oaks" (1889) by Albert Kellogg and Edward L. Greene.
From the Image Gallery
No images of this plant
Plant Characteristics
Duration: PerennialHabit: Tree
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Venation: Pinnate
Breeding System: Flowers Unisexual , Monoecious
Inflorescence: Catkin
Fruit Type: Nut
Size Notes: Up to about 50 feet tall.
Bloom Information
Bloom Color: White , GreenBloom Time: Mar , Apr , May
Distribution
USA: CANative Distribution: Santa Rose, Santa Cruz, and Santa Catalina islands of S. California; absent from mainland; near sea level.
Native Habitat: Ravines and canyons; in chaparral and woodlands.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:Santa Barbara Botanic Garden - Santa Barbara, CA
Web Reference
Webref 30 - Calflora (2018) CalfloraWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 36 - Jepson eFlora (2019) The Jepson Herbarium, University of California, Berkeley
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resources
USDA: Find Quercus ×macdonaldii in USDA PlantsFNA: Find Quercus ×macdonaldii in the Flora of North America (if available)
Google: Search Google for Quercus ×macdonaldii
Metadata
Record Modified: 2023-06-08Research By: TWC Staff