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  1. Quercus agrifolia
    Quercus agrifoliaSpecies of plant
    OverviewUsesHow to growPropagationCharacteristicsColorsNative range
     
  2. Calscape
    https://calscape.org › Quercus-agrifolia-(Coast-Live-Oak)

    Coast Live Oak - Calscape

    Quercus agrifolia - Wikipedia

    Coast live oak typically has a much-branched trunk and reaches a mature height of 10–25 metres (33–82 feet). Some specimens may attain an age exceeding 1,000 years. Examples of this include the Grand Oak of Cherry Valley, California, the Encino Oak Tree, which died in the 1990s (part of the stump has been preserved) and the Pechanga Great Oak. The tree is extremely drought-tolerant.

    Coast live oak typically has a much-branched trunk and reaches a mature height of 10–25 metres (33–82 feet). Some specimens may attain an age exceeding 1,000 years. Examples of this include the Grand Oak of Cherry Valley, California, the Encino Oak Tree, which died in the 1990s (part of the stump has been preserved) and the Pechanga Great Oak. The tree is extremely drought-tolerant.

    The trunk, particularly for older individuals, may be highly contorted, massive and gnarled. The crown is broadly rounded and dense, especially when aged 20 to 70 years; in later life the trunk and branches are more well defined and the leaf density lower. The oldest specimens might exceed 6 m (20 ft) in trunk circumference and 30 m (100 ft) in height.

    The leaves are dark green, oval, often convex in shape, 2–7 centimetres (3⁄4–2+3⁄4 inches) long and 1–4 cm (1⁄2–1+1⁄2 in) broad; the leaf margin is spiny-toothed (spinose), with sharp thistly fibers that extend from the lateral leaf veins. The outer layers of leaves are designed for maximum solar absorption, c…

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    Wikipedia

    Quercus agrifolia, the California live oak, or coast live oak, is an evergreen live oak native to the California Floristic Province. Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. Coast live oaks may be shrubby, depending on age and growing location, but is generally a medium-sized tree. It grows west of the Sierra Nevada mountain range from Mendocino County, California, south to northern Baja California in Mexico. It is classified in the red oak section of oaks (Quercus sect. Lobatae).

    This species is commonly sympatric with canyon live oak (Q. chrysolepis), and the two may be hard to distinguish because their spinose leaves are superficially similar.

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    In naming the species, Née compared it to a species illustrated in Leonard Plukenet's Phytographia under the descriptive name "Ilex folio agrifolii americana, forte agria, vel aquifolia glandifera" which Plukenet had compared, in his Almagestum botanicum, to Luigi Anguillara's Agrifolia glandifera, the noun 'Agrifolia' being a Medieval Latin form of 'Aquifolium' meaning a holly or holly-leaved oak, and related to the Modern Italian 'Agrifoglio,' meaning 'holly.'

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    Normally the tree is found on well-drained soils of coastal hills and plains, often near year-round or perennial streams. It may be found in several natural communities including coast live oak woodland, Engelmann oak woodland, valley oak woodland and both northern and southern mixed evergreen forests. While normally found within 100 kilometers (62 miles) of the Pacific Ocean at elevations less than 700 m (2,300 ft), in southern California it occasionally occurs at up to 1,500 m (4,900 ft) in elevation.

    It is the only California native oak that thrives in the coastal environment, although it is rare on the immediate shore; it enjoys the mild winter and summer climate afforded by ocean proximity, and it is somewhat tolerant of aerosol-borne sea salt. The coastal fog supplies relief from the rainless California summer heat.

    It is the dominant overstory plant of the coast live oak woodland habitat, often joined by California bay laurel and California buckeye north of Big Sur. Associated understory plants include toyon, various manzanitas and western poison-oak.

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    The pollen of the coast live oak is a severe allergen. Pollination occurs in spring.

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