Quercus × macdonaldii | |
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Leaves from an individual on Santa Cruz Island, California | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fagales |
Family: | Fagaceae |
Genus: | Quercus |
Subgenus: | Quercus subg. Quercus |
Section: | Quercus sect. Quercus |
Species: | Q. × macdonaldii
|
Binomial name | |
Quercus × macdonaldii | |
Synonyms [2] | |
|
Quercus × macdonaldii, [1] [3] [4] 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]
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. [5]
The tree is endemic to the California Channel Islands, on Santa Cruz Island, Santa Rosa Island, and Santa Catalina Island, in Southern California. [3] It is found in chaparral and woodlands habitats in canyons and slopes below 600 metres (2,000 ft). [3]
The plant was reclassified as Quercus × macdonaldii, a naturally occurring hybrid of Quercus lobata and Quercus pacifica, or possibly other oak species. [3] [4] [6] Both parents are placed in section Quercus. [7] It is considered a species by Greene but derived from hybrids involving Quercus pacifica, Quercus lobata, and possibly others. [5]
Quercus × macdonaldii | |
---|---|
Leaves from an individual on Santa Cruz Island, California | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fagales |
Family: | Fagaceae |
Genus: | Quercus |
Subgenus: | Quercus subg. Quercus |
Section: | Quercus sect. Quercus |
Species: | Q. × macdonaldii
|
Binomial name | |
Quercus × macdonaldii | |
Synonyms [2] | |
|
Quercus × macdonaldii, [1] [3] [4] 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]
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. [5]
The tree is endemic to the California Channel Islands, on Santa Cruz Island, Santa Rosa Island, and Santa Catalina Island, in Southern California. [3] It is found in chaparral and woodlands habitats in canyons and slopes below 600 metres (2,000 ft). [3]
The plant was reclassified as Quercus × macdonaldii, a naturally occurring hybrid of Quercus lobata and Quercus pacifica, or possibly other oak species. [3] [4] [6] Both parents are placed in section Quercus. [7] It is considered a species by Greene but derived from hybrids involving Quercus pacifica, Quercus lobata, and possibly others. [5]