Below the lodgepole forest is forest dominated by Jeffrey pine. Higher elevations to support subalpine forests of limber pine, lodgepole pine, and Jeffrey pine. Jeffrey pine occurs on ultramafic lava soils. The linear "n"-heptane can be obtained from Jeffrey pine oil. Mature forests of lodgepole pine, Jeffrey pine, and white fir surround the meadow. Sources agree that the Jeffrey pine is more strongly scented than the ponderosa pine. In the Western United States, yellow pine refers to Jeffrey pine or ponderosa pine. Common trees are the Jeffrey Pine, Sugar Pine and Pinon Pine. Jeffrey Pine and Ponderosa Pine are also found in large numbers. Sentinel Dome is known for a Jeffrey Pine that grew from its peak (see photograph). Jeffrey pine wood and ponderosa pine wood are sold together as yellow pine. Jeffrey pine is more stress tolerant than ponderosa pine in the Sierra Nevada. Jeffrey pine, knobcone pine, and golden chinquapin have also been identified. Jeffrey pine ("Pinus jeffreyi") is the dominant species at higher elevations. Vegetation in this area includes Jeffrey pine, ponderosa pine, incense cedar, and sugar pine.