"Blue Oak" redirects here. For other uses, see Blue Oak (disambiguation).
Blue oak
A large blue oak in a pasture in Mariposa County, California
Conservation status
Least Concern (IUCN 3.1)[1]
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. douglasii
Binomial name
Quercus douglasii
Hook. & Arn.[2]
Natural range
Synonyms[3]
Quercus douglasii var. ransomii (Kellogg) Beissn.
Quercus gambelii Liebm.[note 1]
Quercus oblongifolia var. brevilobata Torr.
Quercus ransomii Kellogg
Quercus douglasii, known as blue oak, is a species of oak endemic to California, common in the Coast Ranges and the foothills of the Sierra Nevada.[4] It is California's most drought-tolerant deciduous oak,[5] and is a dominant species in the blue oak woodland ecosystem. It is occasionally known as mountain oak and iron oak.[6][7]
^Beckman, E. (2016). "Quercus douglasii". IUCN Red List of Threatened Species. 2016: e.T78914533A78914539. doi:10.2305/IUCN.UK.2016-1.RLTS.T78914533A78914539.en. Retrieved November 12, 2021.
^Wyly, Zarah (February 8, 2019). "Species Spotlight: Quercus douglasii Hook. & Arn". International Oak Society. Retrieved July 14, 2019.
^"Quercus douglasii". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew – via The Plant List. Note that this website has been superseded by World Flora Online
^Hogan, C. Michael. "Blue Oak Quercus douglasii". GlobalTwitcher. Archived from the original on May 26, 2013. Retrieved July 14, 2019.
^Fryer, Janet L. (2007). "Quercus douglasii". Fire Effects Information System (FEIS). US Department of Agriculture (USDA), Forest Service (USFS), Rocky Mountain Research Station, Fire Sciences Laboratory.
^McDonald, Philip M. (1990). "Quercus douglasii". In Burns, Russell M.; Honkala, Barbara H. (eds.). Hardwoods. Silvics of North America. Vol. 2. Washington, D.C.: United States Forest Service (USFS), United States Department of Agriculture (USDA) – via Southern Research Station.
^"Quercus douglasii". Calflora. Berkeley, California: The Calflora Database.
Cite error: There are <ref group=note> tags on this page, but the references will not show without a {{reflist|group=note}} template (see the help page).
Quercusdouglasii, known as blue oak, is a species of oak endemic to California, common in the Coast Ranges and the foothills of the Sierra Nevada. It...
varieties: Quercus garryana var. garryana – tree to 65 (100) ft. British Columbia south along the Cascades to the California Coast Ranges. Quercus garryana...
Oak tree – Quercus Algerian Oak – Quercus canariensis Blue oak – Quercusdouglasii Bur oak – Quercus macrocarpa California Black Oak Quercus kelloggii...
Sierra Nevada, knobcone pine is often a co-dominant with blue oak (Quercusdouglasii). The species is susceptible to fire, but this melts the cone resin...
Quercus species – oaks: Quercus agrifolia – coast live oak Quercus berberidifolia – scrub oak Quercus chrysolepis – canyon live oak Quercusdouglasii...
stands of Black Oak (Quercus kelloggii), Blue Oak (Quercusdouglasii) and Douglas-fir (Pseudotsuga menziesii). The Quercusdouglasii occurrences are a disjunctive...
Suitable habitat includes blue oak (Quercusdouglasii) savanna, gray pine-oak forest (Pinus sabiniana-Quercus spp.), mixed conifer forest, and alpine...
poorly drained clay soils. It commonly occurs in association with Quercusdouglasii, and "Oak/Foothill Pine vegetation" (also known as "Oak/Gray Pine...
racemosa). The most common trees are coast live oak (Quercus agrifolia) and blue oak (Quercusdouglasii), with the largest blue oak growing in Alameda County...
(Pinus sabiniana), Blue Oak (Quercusdouglasii), Interior Live Oak (Quercus chrysolepis), California Black Oak (Quercus kelloggii), California Buckeye...
oak woodland dominated by valley oak (Quercus lobata), blue oak (Quercusdouglasii), interior live oak (Quercus wislizenii), and gray pine (Pinus sabiniana)...
California black oak is found in the Siskiyou Mountains. The blue oak, Quercusdouglasii, is beyond its contiguous range; however, there are disjunctive populations...
woodland species include: canyon live oak (Quercus chrysolepis), valley oak (Quercus lobata), blue oak (Quercusdouglasii), and gray pine (Pinus sabiniana). Montane...
(Quercus agrifolia), blue oak (Quercusdouglasii), coastal sage scrub oak (Quercus dumosa), valley oak (Quercus lobata) and interior live oak (Quercus...
the western United States. The larvae feed on Quercus dumosa, Quercusdouglasii, Quercus garryana, Quercus ajoensis and Chrysolepis sempervirens. Markku...
chaparral. Blue oak (Quercus douglasii) - in the Central Valley foothills and Coast Ranges. California black oak (Quercus kelloggii) - in the higher hills...
(Populus freemontii) Blue oak (Quercusdouglasii) Valley oak (Quercus lobata) Oracle oak (Quercus morehus) Interior live oak (Quercus wislizenii) California pipe...
oak (Quercus agrifolia), Blue oak (Quercusdouglasii), and Black oak (Quercus kelloggii). Flora of the Southern Inner Coast Ranges includes: Quercus alvordiana...
Resources. Retrieved 2018-09-22. C. Michael Hogan (2008) Blue Oak: Quercusdouglasii, GlobalTwitcher.com, ed. N. Stromberg Archived 2012-02-28 at the Wayback...
Global Information
