A large Blue Oak in a pasture in Mariposa County, California. Pasture is land with Herbaceous vegetation cover used for grazing of Ungulate Livestock as part of a Farm or Ranch. Mariposa County is a County in the US state of California, located in the western foothills of the Sierra Nevada mountains
Hook. & Arn.
The Blue Oak (Quercus douglasii) is an oak in the white oak section of the genus, Quercus sect. Sir William Jackson Hooker, FRS ( July 6, 1785 &mdash August 12, 1865) was an English botanist. George Arnott Walker-Arnott ( February 6, 1799 - June 17, 1868) was a Scottish Botanist. The term oak can be used as part of the common name of any of about 400 species of Trees and Shrubs in the Genus Quercus (from Latin This is an incomplete list of Quercus Species. The Genus contains about 400 species Quercus. It is native to the foothills surrounding the Central Valley of California, USA. The Central Valley is a large flat valley that dominates the central portion of the U California ( is a US state on the West Coast of the United States, along the Pacific Ocean. The United States of America —commonly referred to as the It is also sometimes known as the Mountain Oak, and occasionally the Iron Oak.
Blue Oaks are medium-sized trees growing up to 15–25 m tall, usually with a somewhat irregularly-shaped crown, and a trunk 0. A tree is a perennial Woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or 5–1 m in diameter. The bark is light gray with many medium-sized dark cracks; from a distance, it can appear almost white. Bark, also known as periderm is the outermost layer of stems and Roots of Woody plants such as Trees It overlays the Wood and consists The name Blue Oak derives from the dark blue-green tint of its leaves, which are deciduous, 4–10 cm long, and entire or shallowly lobed. In Botany, a leaf is an above-ground Plant organ specialized for Photosynthesis. Botany Autumn leaf color. See --> In Botany and Horticulture, deciduous Plants, including The blue color can be subtle but becomes much more evident when viewed next to one of the live oaks with whom it shares its range, which tend to have much greener leaves. This article is about the treeThis is Georgia's state tree For places named Live Oak see Live Oak. The acorns are 2–3 cm long, with a moderately sweet kernel, and mature in 6–7 months from pollination. The acorn is the nut of the Oak tree (genera Quercus, Lithocarpus and Cyclobalanopsis, in the Nut is a general term for the large dry oily Seeds or Fruit of some Plants. Pollination in angiosperms and Gymnosperms is the process that transfers pollen grains, which contain the male Gametes (sperm to where the female It prefers dry soil and plenty of sunlight.
Natural hybrids between Blue Oak and the related Shrub Live Oak (Quercus turbinella), Valley Oak (Q. The Valley oak (Quercus lobata is the largest of North American oaks lobata) and Oregon White Oak (Q. The Garry Oak ( Quercus garryana) also known as Oregon White Oak or Oregon Oak, has a range from southern California to extreme southwestern garryana) often occur where the species grow together in the same area. Other species sympatric with the Blue oak include Canyon live oak and Pacific madrone. Sympatric speciation is the genetic divergence of various populations (from a single parent species inhabiting the same geographic region such that those populations become different Quercus chrysolepis, commonly termed Canyon live oak, is a Species of Evergreen Oak that is found in the southwestern part of The Pacific Madrone ( Arbutus menziesii) is a species of Arbutus found on the west coast of North America, from British Columbia (chiefly
It is susceptible to Sudden Oak Death disease (Phytophthora ramorum), though less so than Tanoak (Lithocarpus densiflorus), or red oaks such as Coast live oak (Q. Sudden Oak Death is the common name of a disease caused by the Oomycete Plant pathogen Phytophthora ramorum. Lithocarpus densiflorus, commonly known as the Tanoak or Tanbark-oak, is an Evergreen Tree in the beech family Fagaceae This is an incomplete list of Quercus Species. The Genus contains about 400 species agrifolia).
Bark of the Blue Oak
Blue Oak and Canyon Live Oak leaves for comparison