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Western White Pine
 
 
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Western White Pine (Pinus monticola; family Pinaceae
Pinaceae

The family Pinaceae , is in the order Pinales and includes many of the well-known conifers of commercial importance such as cedars, firs, Tsugas, larches, pines and spruces....
) is a species of pine
Pine

Pines are Pinophyta trees in the genus Pinus, in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species....
 that occurs in the mountains of the western United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 and Canada
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
, specifically the Sierra Nevada, the Cascade Range
Cascade Range

The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California....
, the Coast Range, and the northern Rocky Mountains
Rocky Mountains

The Rocky Mountains, often called the Rockies, are a mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometre from the northernmost part of British Columbia, in Canada, to New Mexico, in the United States....
. The tree extends down to sea level in many areas, particularly in Oregon and Washington. It is the state tree of Idaho
Idaho

The State of Idaho is a U.S. state in the Pacific Northwest region of the United States of America. The state's largest city and Capital is Boise, Idaho....
.

Western White Pine is a large tree
TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
, regularly growing to 30-50 m and exceptionally up to 70 m tall.






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Western White Pine (Pinus monticola; family Pinaceae
Pinaceae

The family Pinaceae , is in the order Pinales and includes many of the well-known conifers of commercial importance such as cedars, firs, Tsugas, larches, pines and spruces....
) is a species of pine
Pine

Pines are Pinophyta trees in the genus Pinus, in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species....
 that occurs in the mountains of the western United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 and Canada
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
, specifically the Sierra Nevada, the Cascade Range
Cascade Range

The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California....
, the Coast Range, and the northern Rocky Mountains
Rocky Mountains

The Rocky Mountains, often called the Rockies, are a mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometre from the northernmost part of British Columbia, in Canada, to New Mexico, in the United States....
. The tree extends down to sea level in many areas, particularly in Oregon and Washington. It is the state tree of Idaho
Idaho

The State of Idaho is a U.S. state in the Pacific Northwest region of the United States of America. The state's largest city and Capital is Boise, Idaho....
.

Western White Pine is a large tree
TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
, regularly growing to 30-50 m and exceptionally up to 70 m tall. It is a member of the white pine
Pinus classification

There are three main subgenera of Pine, the subgenus Strobus , the subgenus Ducampopinus , and the subgenus Pinus . This classification into the three subgenera is based on cone, seed and leaf characters:...
 group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. The needles are finely serrated, and 5-13 cm long. The cones are long and slender, 12-32 cm long and 3-4 cm broad (closed), opening to 5-8 cm broad; the scales are thin and flexible. The seeds are small, 4-7 mm long, and have a long slender wing 15-22 mm long.

It is related to Eastern White Pine
Eastern White Pine

is a large pine native to eastern North America, occurring from Newfoundland west to Minnesota and southeastern Manitoba, and south along the Appalachian Mountains to the extreme south of Georgia ....
 (Pinus strobus), differing from it in having larger cones, slightly longer-lasting leaves (2-3 years, rather than 1.5-2 years) with more prominent stoma
Stoma

In botany, a stoma is a pore, found in the leaf and stem epidermis that is used forgas exchange. The pore is formed by a pair of specialized parenchyma cells known as guard cells which are responsible for regulating the size of the opening....
tal bands, and a somewhat denser and narrower habit. The branches are borne in regular whorls, produced at the rate of one a year; this is pronounced in narrow, stand-grown trees, while open specimens may have a more rounded form with wide-reaching limbs. It is widely grown as an ornamental tree, but has been heavily logged throughout much of its range in the past.

It has been seriously affected by the White Pine Blister Rust
Cronartium ribicola

'Cronartium ribicola' is a species of rust in the family Cronartiaceae that causes the disease 'white pine blister rust'.Like many other rusts, C....
 (Cronartium ribicola), a fungus that was accidentally introduced from Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
 in 1909. The United States Forest Service
United States Forest Service

The USDA Forest Service is an agency of the United States Department of Agriculture that administers the nation's 155 United States National Forest and 20 United States National Grassland....
 estimates that 90% of the Western White Pines have been killed by the blister rust west of the Cascades
Cascade Range

The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California....
. Large stands have been succeeded by other pines or non-pine species. The rust has also killed much of the Whitebark Pine
Whitebark Pine

The Whitebark Pine occurs in the mountains of the Western United States and Canada, specifically the subalpine areas of the Sierra Nevada , the Cascade Range, the Pacific Coast Ranges, and the northern Rocky Mountains ....
 outside of California
California

California is a U.S. state on the West Coast of the United States of the United States, along the Pacific Ocean. It is bordered by Oregon to the north, Nevada to the east, Arizona to the southeast, and to the south the Mexico state of Baja California....
.

Resistance to the blister rust is genetic, and due to Western White Pine's genetic variability some individuals are relatively unaffected by the rust. The US Forest Service has a program for locating and breeding rust-resistant Western White Pine and Sugar Pine
Sugar Pine

The Sugar Pine is a species of pine that occurs in the mountains of Oregon and California in the western United States, and Baja California in northwestern Mexico; specifically the Sierra Nevada , the Cascade Range, the Coast Ranges, and the Sierra San Pedro Martir....
 (see external link below). Seedlings of these trees have been introduced into the wild.