Question: What is the formal name of the tree that is the dominant vegetation on the west side of the Ochoco Mountains, commonly known as the ponderosa pine?

full_context: Document 1: Ochoco Mountains: The Ochoco Mountains are a mountain range in central Oregon in the United States, located at the western end of the Blue Mountains. They were formed when Permian, Triassic, and Jurassic rocks were slowly uplifted by volcanic eruptions to form the Clarno Formation. Today, the highest point in the range is Lookout Mountain. The dominant vegetation on the west side of the range is old-growth ponderosa pine; on the east side, western juniper is common. The western area of the mountains is administered by the Ochoco National Forest, while the southeastern section is part of the Malheur National Forest. The Ochoco Mountains are used for hiking, camping, bird watching, rockhounding, and hunting, as well as cross-country skiing in the winter.
Document 2: Deschutes National Forest: The Deschutes National Forest is a United States National Forest located in parts of Deschutes, Klamath, Lake, and Jefferson counties in central Oregon. It comprises 1.8 e6acre along the east side of the Cascade Range. In 1908, the Deschutes National Forest was established from parts of the Blue Mountains, Cascade, and Fremont National Forests. In 1911, parts of the Deschutes National Forest were split off to form the Ochoco and Paulina National Forests, and parts of the Cascade and Oregon National Forests were added to the Deschutes. In 1915, the lands of the Paulina National Forest were rejoined to the Deschutes National Forest. A 1993 Forest Service study estimated that the extent of old growth in the forest was 348100 acre . Within the boundaries of the Deschutes National Forest is the Newberry National Volcanic Monument, containing cinder cones, lava flows, and lava tubes. The Deschutes National Forest as a whole contains in excess of 250 known caves.
Document 3: Central Oregon Coast Range: The Central Oregon Coast Range is the middle section of the Oregon Coast Range, in the Pacific Coast Ranges physiographic region, and located in the west-central portion of the state of Oregon, United States roughly between the Salmon River and the Umpqua River and the Willamette Valley and the Pacific Ocean. This approximately 90 mi long mountain range contains mountains as high as 4,097 feet (1,226 m) for Marys Peak.
Document 4: Eastern Cascades Slopes and Foothills (ecoregion): The Eastern Cascades Slopes and Foothills ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Oregon, Washington, and California. In the rain shadow of the Cascade Range, the eastern side of the mountains experiences greater temperature extremes and receives less precipitation than the west side. Open forests of ponderosa pine and some lodgepole pine distinguish this region from the Cascades ecoregion, where hemlock and fir forests are more common, and from the lower, drier ecoregions to the east, where shrubs and grasslands are predominant. The vegetation is adapted to the prevailing dry, continental climate and frequent wildfire. Volcanic cones and buttes are common in much of the region.
Document 5: Pinus arizonica: 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 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 ("Pinus ponderosa"). The cones are single, paired, or in whorls of three, and 5–11 cm long.
Document 6: Pseudotsuga: Pseudotsuga is a genus of evergreen coniferous trees in the family Pinaceae. Common names include Douglas fir, Douglas-fir, Douglas tree, and Oregon pine. "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. Nineteenth-century botanists had problems in classifying Douglas-firs, due to the species' similarity to various other conifers better known at the time; they have at times been classified in "Pinus", "Picea", "Abies", "Tsuga", and even "Sequoia". Because of their distinctive cones, Douglas-firs were finally placed in the new genus "Pseudotsuga" (meaning "false hemlock") by the French botanist Carrière in 1867. The genus name has also been hyphenated as "Pseudo-tsuga".
Document 7: Pinus ponderosa: Pinus ponderosa, commonly known as the ponderosa pine, bull pine, blackjack pine, or western yellow-pine, is a very large pine tree species of variable habitat native to the western United States and Canada. It is the most widely distributed pine species in North America.
Document 8: Douglas fir: Pseudotsuga menziesii, commonly known as Douglas fir or Douglas-fir, is an evergreen conifer species native to western North America. One variety, the coast Douglas fir, grows along the Pacific Ocean from central British Columbia south to central California. A second variety, the Rocky Mountain Douglas fir, grows in the Rocky Mountains from British Columbia south to Mexico. The tree is dominant in western Washington. It is extensively used for timber, worldwide.
Document 9: Big Tree (Washington): The Big Tree (also known as the Trout Lake Big Tree) was a massive Ponderosa pine tree in old growth pine and fir forest in southern Washington state, at the southern base of Mount Adams. It is managed by the Mount Adams Ranger District of the Gifford Pinchot National Forest. The tree is 202 ft tall with a diameter of 7 ft , and was one of the largest known ponderosa pine trees in the world. It had been stressed by attacks from mountain pine beetles and its death in 2015 was confirmed the following year.
Document 10: Blue spruce: The blue spruce, green spruce, white spruce, Colorado spruce, or Colorado blue spruce, with the scientific name Picea pungens, is a species of spruce tree. It is native to the Rocky Mountains of the United States. Its natural range extends from northern New Mexico through Colorado and Utah to Wyoming and into far southwest Montana, but it has been widely introduced elsewhere and is used as an ornamental tree in many places far beyond its native range. The blue spruce has blue coloured needles and is a coniferous tree.
Document 11: Hager Mountain: Hager Mountain is a volcanic peak in Oregon in the northwest corner of the Basin and Range Province in the United States. The mountain is located south of the small unincorporated community of Silver Lake in south-central Oregon, and it is in the Fremont–Winema National Forest. On the summit, there is a fire lookout operated during the summer and fall by the United States Forest Service. There are several hiking trails that lead to the lookout station.
Document 12: Rocky Mountain ponderosa pine forest: The Rocky Mountain ponderosa pine forest is a forest plant community at an elevation of 2100 - in the Rocky Mountains, in the U.S. state of Colorado. It is an important temperate coniferous forest ecoregion, including some endemic wildlife and grass species that are only found in this ponderosa pine ("Pinus ponderosa") habitat.
Document 13: Maritime coast range ponderosa pine forest: The maritime coast range ponderosa pine forests are rare temperate forest assemblages associated with a limited range portion of the Santa Cruz Mountains of northern California. There are only three known small forests of this type, all situated in Santa Cruz County, California. The dominant tree species is the ponderosa pine.
Document 14: Southern Oregon Coast Range: The Southern Oregon Coast Range is the southernmost section of the Oregon Coast Range, in the Pacific Coast Ranges, located in the southwest portion of the state of Oregon, United States, roughly between the Umpqua River and the middle fork of the Coquille River, beyond which are the Klamath Mountains. To the east is the Umpqua Valley and to the west the Pacific Ocean. This approximately 55 mi -long mountain range contains mountains as high as 3547 ft for Bone Mountain. The mountains are known locally in the Roseburg area as the Callahan Mountains, or simply as The Callahans.
Document 15: Lomatium ochocense: Lomatium ochocense is a rare species of flowering plant in the carrot family known by the common name Ochoco lomatium. It is endemic to Oregon, where it is limited to the Ochoco Mountains of Crook County.
ground_truth: ponderosa pine