{"id":1413171,"date":"2014-11-10T08:53:19","date_gmt":"2014-11-10T08:53:19","guid":{"rendered":""},"modified":"2024-12-24T18:29:19","modified_gmt":"2024-12-24T12:59:19","slug":"quercus-agrifolia","status":"publish","type":"ht_kb","link":"https:\/\/efloraofindia.com\/efi\/quercus-agrifolia\/","title":{"rendered":"Quercus agrifolia (USA)"},"content":{"rendered":"
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Quercus<\/i> agrifolia<\/i> N\u00e9e<\/span><\/font><\/span><\/a>, Anales Ci. Nat. 3: 271 1801<\/i>. (Syn: Quercus<\/i> acroglandis<\/i> Kellogg<\/span><\/font><\/span><\/a>; Quercus<\/i> acutiglandis<\/i> Sarg.<\/span><\/font><\/span><\/a>; Quercus<\/i> agrifolia<\/i> var.<\/span> agrifolia<\/i> <\/font><\/span><\/a>; Quercus<\/i> agrifolia<\/i> var.<\/span> frutescens<\/i> Engelm.<\/span><\/font><\/span><\/a>; Quercus<\/i> agrifolia<\/i> var.<\/span> oxyadenia<\/i> (Torr.) J.T.Howell<\/span><\/font><\/span><\/a>; Quercus<\/i> oxyadenia<\/i> Torr.<\/span><\/font><\/span><\/a>; Quercus<\/i> pricei<\/i> Sudw.<\/span><\/font><\/span><\/a>);<\/div>\n
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Quercus agrifolia<\/i>, the coast live oak<\/b>, is an evergreen<\/font><\/a> oak<\/font><\/a> (highly variable and often shrubby), native to the <\/font>California Floristic Province<\/font><\/a>. It grows west of the <\/font>Sierra Nevada<\/font><\/a> from <\/font>Mendocino County<\/font><\/a>, <\/font>California<\/font><\/a>, south to northern <\/font>Baja California<\/font><\/a> in <\/font>Mexico<\/font><\/a>.<\/font> It is classified in the red oak<\/font><\/a> section (Quercus<\/i> sect. Lobatae<\/i>).<\/div>\n

This species is commonly <\/font>sympatric<\/font><\/a> with <\/font>canyon live oak<\/font><\/a>, and the two may be hard to distinguish because their spinose leaves are superficially similar.<\/font><\/div>\n
Coast live oak typically has a much-branched trunk and reaches a mature height of 10\u201325\u00a0meters. Some specimens may attain an age exceeding 250\u00a0years, with trunk diameters up to three or four meters, such as those on the <\/font>Filoli<\/font><\/a> estate in <\/font>San Mateo County<\/font><\/a>.<\/font><\/div>\n
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\u00a0years; in later life the trunk and branches are more well defined and the leaf density lower.<\/font><\/div>\n
The <\/font>leaves<\/font><\/a> are dark green, oval, often <\/font>convex<\/font><\/a> in shape, 2\u20137\u00a0cm long and 1\u20134\u00a0cm 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 <\/font>solar<\/font><\/a> absorption, containing two to three layers of <\/font>photosynthetic<\/font><\/a> cells.<\/font><\/div>\n
These outer leaves are deemed to be small in size to more efficiently re-radiate the heat gained from solar capture. Shaded leaves are generally broader and thinner, having only a single layer of photosynthetic cells. The convex leaf shape may be useful for interior leaves which depend on capturing reflected light scattered in random directions from the outer canopy.<\/font><\/div>\n
The <\/font>flowers<\/font><\/a> are produced in early-to-mid spring; the male flowers are pendulous <\/font>catkins<\/font><\/a> 5\u201310\u00a0cm long, the female flowers inconspicuous, less than 0.5\u00a0cm long, with 1-3 clustered together. The <\/font>fruit<\/font><\/a> is a slender reddish brown <\/font>acorn<\/font><\/a> 2-3.5\u00a0cm long and 1-1.5\u00a0cm broad, with the basal quarter enclosed in a <\/font>cupule<\/font><\/a>; unusually for a red oak, the acorns mature about 7\u20138 months after pollination (most red oak acorns take 18 months to mature).<\/font><\/div>\n
\u00a0Coast live oak is the only California native oak that actually 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.<\/font>\u00a0<\/div>\n
Normally the tree is found on well drained soils of coastal hills and plains, often near year round or <\/font>perennial streams<\/font><\/a>.<\/font>\u00a0<\/div>\n
(From Wikipedia<\/font><\/a>\u00a0on 10.11.14)<\/div>\n
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Small Tree For ID : Oak Species : California : 25OCT14 : AK-30<\/a> : 4 posts by 3 authors. Attachments<\/span> (3<\/span>)<\/font><\/span><\/span><\/div>\n

Small tree<\/font> seen in the Golden Gate Park,<\/font> San Francisco<\/font> on 30\/9\/14.<\/p>\n
Acorns, or Oak Nuts seen on the tree.<\/div>\n
On searching, could this be Quercus agrifolia<\/i>?<\/p>\n
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Yes, …; it does look like Q. agrifolia<\/i>.<\/p>\n
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Thanks for confirming.<\/p>\n
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References:<\/span><\/p>\n

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<\/font>The Plant List Ver.1.1<\/a> \u00a0<\/span>WCSP<\/a>\u00a0\u00a0<\/span>Wikipedia<\/a>
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Quercus agrifolia N\u00e9e, Anales Ci. Nat. 3: 271 1801. (Syn: Quercus acroglandis Kellogg; Quercus acutiglandis Sarg.; Quercus agrifolia var. agrifolia ; Quercus agrifolia var. frutescens Engelm.; Quercus agrifolia var. oxyadenia (Torr.) J.T.Howell; Quercus oxyadenia Torr.; Quercus pricei Sudw.); \u00a0 Quercus agrifolia, the coast live oak, is an evergreen oak (highly…<\/p>\n","protected":false},"author":3,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[5381],"ht-kb-tag":[],"class_list":["post-1413171","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-quercus-robur"],"_links":{"self":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb\/1413171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/comments?post=1413171"}],"version-history":[{"count":0,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb\/1413171\/revisions"}],"wp:attachment":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/media?parent=1413171"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb-category?post=1413171"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb-tag?post=1413171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}