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Sierra Juárez And San Pedro Mártir Pine–oak Forests
The Sierra Juárez and San Pedro Mártir pine–oak forests is a Nearctic temperate coniferous forests ecoregion that covers the higher elevations of the Sierra Juárez and Sierra San Pedro Mártir ranges of the Peninsular Ranges, of the northern Baja California Peninsula of Mexico. The pine–oak forests extend throughout the central portion of the Mexican state of Baja California and terminate near the border with the U.S. state of California. Setting The pine–oak forests cover an area of , bounded by the southern extent of the California chaparral and woodlands to the west, by the Baja California Desert to the southwest, and by the Sonoran Desert to the east. It lies at the southeastern extent of the Mediterranean climate region that covers much of California and the northwestern corner of Baja California, and the climate is temperate with winter rains. It is one of the southernmost ecoregions of the temperate coniferous forest biome in North America, and the only instanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nearctic Realm
The Nearctic realm is one of the eight biogeographic realms constituting the Earth's land surface. The Nearctic realm covers most of North America, including Greenland, Central Florida, and the highlands of Mexico. The parts of North America that are not in the Nearctic realm are Eastern Mexico, Southern Florida, coastal Central Florida, Central America, and the Caribbean islands, which, together with South America, are part of the Neotropical realm. Major ecological regions The World Wildlife Fund (WWF) divides the Nearctic into four bioregions, defined as "geographic clusters of ecoregions that may span several habitat types, but have strong biogeographic affinities, particularly at taxonomic levels higher than the species level (genus, family)." Canadian Shield The Canadian Shield bioregion extends across the northern portion of the continent, from the Aleutian Islands to Newfoundland. It includes the Nearctic's Arctic Tundra and Boreal forest ecoregions. In terms of flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Chaparral And Woodlands
The California chaparral and woodlands is a terrestrial ecoregion of southwestern Oregon, northern, central, and southern California (United States) and northwestern Baja California (Mexico), located on the west coast of North America. It is an ecoregion of the Mediterranean forests, woodlands, and scrub biome, and part of the Nearctic realm. Setting Three sub-ecoregions The California chaparral and woodlands ecoregion is subdivided into three smaller ecoregions. *California coastal sage and chaparral ecoregion: In southern coastal California and northwestern coastal Baja California, as well as all the Channel Islands of California and Guadalupe Island. *California montane chaparral and woodlands: In southern and central coast adjacent and inland California, covering some of the mountains of: the Coast Ranges; the Transverse Ranges; and the western slopes of the northern Peninsular Ranges. *California interior chaparral and woodlands: In central interior California surroun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Chrysolepis
''Quercus chrysolepis'', commonly termed canyon live oak, canyon oak, golden cup oak or maul oak, is a North American species of evergreen oak that is found in Mexico and in the western United States, notably in the California Coast Ranges. This tree is often found near creeks and drainage swales growing in moist cool microhabitats. Its leaves are a glossy dark green on the upper surface with prominent spines; a further identification arises from the leaves of canyon live oak being geometrically flat. Description ''Quercus chrysolepis'' is an evergreen tree with significant-sized spreading, horizontal branches, and a broad, rounded crown; it attains a height of 6–30 meters (20–100 feet) and often forms as a shrub. The trunk diameter typically ranges from . Exceptionally large specimens are found in the mountains of Southern California, and rank among the largest oaks in North America. The largest known in the San Bernardino Mountains measures high, with a trunk circumfere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Engelmannii
''Quercus engelmannii'', the Engelmann oak or Pasadena oak, is a species of oak in the white oak section (''Quercus'' sect. ''Quercus''), native to southern California and northwestern Baja California, Mexico. Description ''Quercus engelmannii'' is a small tree growing to tall, generally evergreen, but may be drought-deciduous during the hot, dry local summers, and has a rounded or elliptical canopy. The bark is thick, furrowed, and light gray-brown. The leaves are leathery, long and broad, of a blue-green color, and may be flat or wavy, with smooth margins. The flowers are catkins; the fruit is an acorn long, maturing 6–8 months after pollination. The wood is dark brown and strong, but tends to warp and split upon drying, and is of low value as timber. Distribution The Engelmann oak ranges from the foothills of the San Gabriel Mountains in eastern Los Angeles County through the Santa Ana Mountains of Orange County and the western foothills and mesas of the Peninsular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Agrifolia
''Quercus agrifolia'', the California live oak, or coast live oak, is a highly variable, often evergreen oak tree, a type of live oak, native to the California Floristic Province. It 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. Description Coast live oak typically has a much-branched trunk and reaches a mature height of . 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 Gre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calocedrus
''Calocedrus'', the incense cedar (alternatively spelled incense-cedar), is a genus of coniferous trees in the cypress family Cupressaceae first described as a genus in 1873. It is native to East Asia, eastern Asia and western North America. The generic name ''Calocedrus'' means "beautiful cedar". Description The genus is related to the ''Thuja'', and has similar overlapping scale-leaves. ''Calocedrus'' differs from ''Thuja'' in the scale leaves being in apparent whorls of four (actually opposite decussate pairs like ''Thuja'', but not evenly spaced apart as in ''Thuja'', instead with the successive pairs closely then distantly spaced), and in the conifer cone, cones having just 2–3 pairs of moderately thin, erect scales, rather than 4–6 pairs of very thin scales in ''Thuja''. Species Extant Species Extinct Species Uses Bows and Arrows Incense cedar was one of the favored varieties of wood used to make bows by Native Americans in California. Like Juniper, and Pacific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Concolor
''Abies concolor'', the white fir, is a coniferous tree in the pine family Pinaceae. This tree is native to the mountains of western North America, including the Cascade Range and southern Rocky Mountains, and into the isolated mountain ranges of southern Arizona, New Mexico, and Northern Mexico. It naturally occurs at elevations between . It is popular as an ornamental landscaping tree and as a Christmas tree. Description This large evergreen conifer grows best in the central Sierra Nevada of California, where the record specimen was recorded as tall and measured in diameter at breast height (dbh) in Yosemite National Park.American Forestry Association. 1978. National register of big trees. American Forests 84(4):19-47 The typical size of white fir ranges from tall and up to dbh. The largest specimens are found in the central Sierra Nevada, where the largest diameter recorded was found in Sierra National Forest at (1972); the west slope of the Sierra Nevada is also home ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parry Pinyon
''Pinus quadrifolia'', the Parry pinyon, is a pine in the pinyon pine group native to southernmost California in the United States and northern Baja California in Mexico, from 33° 30' N south to 30° 30' N. The Parry pinyon has a lifespan of around 200 to 500 years. It is usually found in rocky areas that often have thin soil. It occurs at moderate altitudes from to , rarely as low as and as high as . It is scarce and often scattered in this region, forming open woodlands, usually mixed with junipers. Other common names include nut pineFarjon, A. 2013''Pinus quadrifolia''.In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. Downloaded on 31 July 2013. and fourleaf pinyon pine. Description ''Pinus quadrifolia'' is a small to medium size tree, reaching tall and with a trunk diameter of up to , rarely more. The bark is thick, rough and scaly. The leaves (needles) are in fascicles of 4–5, moderately stout, long; glossy dark green with no stomata on the outer face ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeffrey Pine
''Pinus jeffreyi'', also known as Jeffrey pine, Jeffrey's pine, yellow pine and black pine, is a North American pine tree. It is mainly found in California, but also in the westernmost part of Nevada, southwestern Oregon, and northern Baja California.Safford, H.D. 2013. Natural Range of Variation (NRV) for yellow pine and mixed conifer forests in the bioregional assessment area, including the Sierra Nevada, southern Cascades, and Modoc and Inyo National Forests. Unpublished report. USDA Forest Service, Pacific Southwest Region, Vallejo, CA/ref> It is named in honor of its botanist documenter John Jeffrey (botanist), John Jeffrey. Description ''Pinus jeffreyi'' is a large coniferous evergreen tree, reaching tall, rarely up to tall, though smaller when growing at or near tree line. The leaves are needle-like, in bundles of three, stout, glaucous gray-green, long. The cones are long, dark purple when immature, ripening pale brown, with thinly woody scales bearing a short, shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinus Lambertiana
''Pinus lambertiana'' (commonly known as the sugar pine or sugar cone pine) is the tallest and most massive pine tree, and has the longest cones of any conifer. The species name ''lambertiana'' was given by the Scottish botanist David Douglas, who named the tree in honour of the English botanist, Aylmer Bourke Lambert. It is native to coastal and inland mountain areas along the Pacific coast of North America, as far north as Oregon and as far south as Baja California in Mexico. Description Growth The sugar pine is the tallest and largest ''Pinus'' species, commonly growing to tall, exceptionally to tall, with a trunk diameter of , exceptionally . The tallest recorded specimen is tall, is located in Yosemite National Park, and was discovered in 2015. The second tallest recorded was "Yosemite Giant", an tall specimen in Yosemite National Park, which died from a bark beetle attack in 2007. The tallest known living specimens today grow in southern Oregon and Yosemite Nationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lodgepole Pine
''Pinus contorta'', with the common names lodgepole pine and shore pine, and also known as twisted pine, and contorta pine, is a common tree in western North America. It is common near the ocean shore and in dry montane forests to the subalpine, but is rare in lowland rain forests. Like all pines (member species of the genus ''Pinus''), it is an evergreen conifer. Description Depending on subspecies, ''Pinus contorta'' grows as an evergreen shrub or tree. The shrub form is krummholz and is approximately high. The thin and narrow-crowned tree can grow high and achieve up to in diameter at chest height. The ''murrayana'' subspecies is the tallest. The crown is rounded and the top of the tree is flattened. In dense forests, the tree has a slim, conical crown. The formation of twin trees is common in some populations in British Columbia. The elastic branches stand upright or overhang and are difficult to break. The branches are covered with short shoots that are easy to remove. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juniper
Junipers are coniferous trees and shrubs in the genus ''Juniperus'' () of the cypress family Cupressaceae. Depending on the taxonomy, between 50 and 67 species of junipers are widely distributed throughout the Northern Hemisphere, from the Arctic, south to tropical Africa, throughout parts of West Asia, western, Central Asia, central and South Asia, southern Asia, east to eastern Tibet in the Old World, and in the mountains of Central America. The highest-known juniper forest occurs at an altitude of in southeastern Tibet and the northern Himalayas, creating one of the highest tree lines on earth. Description Junipers vary in size and shape from tall trees, tall, to columnar or low-spreading shrubs with long, trailing branches. They are evergreen with needle-like and/or scale-like leaves. They can be either monoecious or dioecious. The female Conifer cone, seed cones are very distinctive, with fleshy, fruit-like coalescing scales which fuse together to form Juniper berry, a&n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
