Pseudotsuga is a genus of evergreen coniferous trees in the family Pinaceae. Common names for species in the genus include Douglas fir, Douglas-fir, Douglas tree, Oregon pine and Bigcone spruce. Pseudotsuga menziesii is widespread in western North America and is an important source of timber. The number of species has long been debated, but two in western North America and two to four in eastern Asia are commonly acknowledged.
Pseudotsuga macrocarpa, commonly called the bigcone spruce or bigcone Douglas-fir, is an evergreen conifer native to the mountains of southern California. It is notable for having the largest cones in the genus Pseudotsuga, hence the name.
The Douglas fir is an evergreen conifer species in the pine family, Pinaceae. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir, Rocky Mountain Douglas-fir and Mexican Douglas-fir.
Pseudotsuga menziesii var. glauca, or Rocky Mountain Douglas-fir, is an evergreen conifer native to the interior mountainous regions of western North America, from central British Columbia and southwest Alberta in Canada southward through the United States to the far north of Mexico. The range is continuous in the northern Rocky Mountains south to eastern Washington, eastern Oregon, Idaho, western and south-central Montana and western Wyoming, but becomes discontinuous further south, confined to "sky islands" on the higher mountains in Utah, Colorado, Arizona and New Mexico, with only very isolated small populations in eastern Nevada, westernmost Texas, and northern Mexico. It occurs from 600 m altitude in the north of the range, up to 3,000 m, rarely 3,200 m, in the south. Further west towards the Pacific coast, it is replaced by the related coast Douglas-fir, and to the south, it is replaced by Mexican Douglas-fir in high mountains as far south as Oaxaca. Some botanists have grouped Mexican Douglas-fir with P. menziesii var. glauca, but genetic and morphological evidence suggest that Mexican populations should be considered a different variety.
Pinus arizonica, commonly known as the Arizona pine, is a medium-sized pine in northern Mexico, southeast Arizona, southwest New Mexico, and western Texas in the United States. It is a tree growing to 25–35 m tall, with a trunk diameter of up to 1.2 m. The needles are in bundles of 3, 4, or 5, with 5-needle fascicles being the most prevalent. This variability may be a sign of hybridization with the closely related ponderosa pine. The cones are single, paired, or in whorls of three, and 5–11 cm long.
Plumas National Forest is a 1,146,000-acre (4,640 km2) United States National Forest located at the northern terminus of the Sierra Nevada, in northern California. The Forest was named after its primary watershed, the Rio de las Plumas, or Feather River.
The Sierra Madre Occidental pine–oak forests are a Temperate broadleaf and mixed forests ecoregion of the Sierra Madre Occidental range from the southwest USA region to the western part of Mexico. They are home to a large number of endemic plants and important habitat for wildlife.
Abies vejarii is a species of fir native to northeastern Mexico, in the states of Coahuila, Nuevo León, and Tamaulipas, where it grows at high altitudes in the Sierra Madre Oriental.
Pinus douglasiana is a species of evergreen conifer in the family Pinaceae. It is found only in Mexico.
Pseudotsuga sinensis is a species of conifer in the family Pinaceae. It is a tree up to 50 metres tall. It is found in China and Taiwan as well as in northernmost parts of Vietnam.
The Alberta Mountain forests are a temperate coniferous forests ecoregion of Western Canada, as defined by the World Wildlife Fund (WWF) categorization system.
Pseudotsuga menziesii var. menziesii, commonly known as Coast Douglas-fir, Pacific Douglas-fir, Oregon pine, or Douglas spruce, is an evergreen conifer native to western North America from west-central British Columbia, Canada southward to central California, United States. In Oregon and Washington its range is continuous from the Cascades crest west to the Pacific Coast Ranges and Pacific Ocean. In California, it is found in the Klamath and California Coast Ranges as far south as the Santa Lucia Mountains with a small stand as far south as the Purisima Hills, Santa Barbara County. In the Sierra Nevada it ranges as far south as the Yosemite region. It occurs from near sea level along the coast to 1,800 metres (5,900 ft) in the California Mountains. Further inland, coast Douglas-fir is replaced by Rocky Mountain or interior Douglas-fir. Interior Douglas-fir intergrades with coast Douglas-fir in the Cascades of northern Washington and southern British Columbia.
The Red Creek Fir is a large Douglas fir tree located in the San Juan Valley of Vancouver Island in British Columbia, Canada. By volume, it is the largest known Douglas fir tree on Earth.
The Laricoideae are a subfamily of the Pinaceae, a Pinophyta division family. They take their name from the genus Larix (larches), which contains inside most of the species of the group and is one of only two deciduous genera of the pines complex. Ecologically important trees, the Laricoideae form pure or mixed forest associations often dominant in the ecosystems in which they are present, thanks also to their biological adaptations to natural disturbances, to reproductive strategies put in place and high average longevity of the individuals. Currently are assigned to this subfamily three genera and its members can be found only in Northern Hemisphere. The various species live for the most part in temperate or cold climates and are the more northerly conifers; some constitute an important source of timber and non-timber forest products.
The Queets Fir is a superlative Douglas fir about 2.5 miles from the Queets River Trail trailhead, on Coal Creek, a tributary of Queets River in the Olympic National Park in Washington State. It was known for fifty years, beginning in 1945, as the largest known fir by volume, and is still largest known in diameter. It has a height of at least 200 feet (61 m), circumference 600 inches (15,000 mm), and spread of 71 feet (22 m). It was listed as national co-champion Douglas fir by American Forests, and one of only a handful of "undisputed megatrees" in North America with over 800 points.
La Michilía Biosphere Reserve is a protected area in northwestern Mexico. It is located in the Sierra Madre Occidental range in the south of the state of Durango.
Papigochic Flora and Fauna Protection Area is a protected area in Chihuahua state of Mexico. It covers an area of 2227.64 km2 in the eastern Sierra Madre Occidental. To the northwest it adjoins Tutuaca Flora and Fauna Protection Area.
The Cuenca Alimentadora del Distrito Nacional de Riego 026 Bajo Río San Juan is a protected area in northeastern Mexico. It extends over part of the northern Sierra Madre Occidental, near the cities of Monterrey and Saltillo.
Quercus saltillensis is a species of oak. It is native to northeastern Mexico. It is placed in Quercus section Lobatae.
