Quercus × macdonaldii
Template:Short description Template:Speciesbox
on the California Channel Islands
Quercus × macdonaldii,[1][2][3] formerly Quercus macdonaldii, with the common names MacDonald's oak and Macdonald oak, is a rare hybrid species of oak in the family Fagaceae.[1]
Description
The tree is between 5 and 15 meters tall, with scaly bark on the trunk. The twigs are gray and tomentose. The leaves are between 4 and 7 centimeters in length, the blades are oblong to obovate, and adaxially glabrous to sparsely hairy. The petioles are between 3 and 10 millimeters. The fruits cup is between 10 and 20 millimeters long and 6 to 10 millimeters deep. The nuts are between 20 and 35 millimeters long and conic-oblong or ovoid. The flowering time is between the months of March and May.[4]
Distribution
The tree is endemic to the California Channel Islands, on Santa Cruz Island, Santa Rosa Island, and Santa Catalina Island, in Southern California.[2] It is found in chaparral and woodlands habitats in canyons and slopes below Script error: No such module "convert"..[2]
Taxonomy
The plant was reclassified as Quercus × macdonaldii, a naturally occurring hybrid of Quercus lobata and Quercus pacifica, or possibly other oak species.[2][3][5] Both parents are placed in section Quercus.[6] It is considered a species by Greene but derived from hybrids involving Quercus pacifica, Quercus lobata, and possibly others.[4]
See also
- California chaparral and woodlands ecoregion
References
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- ↑ a b Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ a b c d Jepson: Quercus × macdonaldii. Retrieved 28 February 2015.
- ↑ a b USDA: Quercus × macdonaldii. Retrieved 28 February 2015.
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External links
- Pages with script errors
- Pages with reference errors
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- Quercus
- Endemic flora of California
- Natural history of the Channel Islands of California
- Natural history of the California chaparral and woodlands
- Natural history of Los Angeles County, California
- Trees of Northern America
- Hybrid plants
- Taxonomy articles created by Polbot