Species of oak tree
 ;templatestyles src="Template:Taxobox/core/styles.css" / ;
Quercus dumosa is a species of plant in the family Fagaceae, belonging to the white oak section of the oak genus ("Quercus"). This tree goes by the common names coastal sage scrub oak and Nuttall's scrub oak.
Description.
"Quercus dumosa" is an evergreen shrub growing 1 to 3 metres (40–120 inches or 3–10 feet) tall from a large, deep root network. The leaves have spiny or toothed edges. The fruit is an acorn up to wide. Some individuals produce large crops of acorns, and some produce very few fruits. The acorns are dispersed by gravity as they fall from the tree, and by animals that pick them up, such as squirrels and jays. Animals eat them immediately or cache them for later. The acorns tend to germinate easily. Reproduction via seed generally occurs only in very moist years.
Taxonomy.
The name "Quercus dumosa" was formerly widely applied to nearly all the scrub oaks of the white oak group of California and Baja California. The concept of this species has gradually narrowed as phylogenetic research and taxonomic treatments have segregated out several species. Oaks previously placed under "Q. dumosa" include:
However, the majority of oaks referred to as "Quercus dumosa" in the past are now regarded as "Quercus berberidifolia". The current concept of "Q. dumosa" is limited to the populations of scraggly shrub oaks with short petioles, cordate leaf bases, erect curly trichomes on the abaxial leaf surface, and narrow, acute acorns which almost always occur at low elevations and very often within sight of the ocean.
Distribution and habitat.
"Quercus dumosa" is found in California and Baja California. In Baja California, it is found from the Mexico–United States border south to the Colonet peninsula. It is threatened by habitat loss. The species lends its name to the plant community called the ""Quercus dumosa" chaparral", in which Coastal sage scrub oak and toyon often co-dominate in chaparral.
Ecology.
"Quercus dumosa" grows primarily in sandy soils such as sandstone near the coast. Its habitat is often chaparral. This oak sprouts vigorously from its stump and root crown after wildfire and develops a large canopy within a few years after a fire event. It sometimes co-dominates with "Ceanothus" species as early as four years after a fire. This oak also does well in the absence of fire.
Allergenicity.
The species is a severe allergen, with pollination generally occurring in spring.
References.
 ;templatestyles src="Reflist/styles.css" / ;