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The knobcone pine can be found growing in the dry, rocky soils of southern Oregon and northern California, between 300 and 750 m (980 and 2,460 ft) above sea level. [4] It forms nearly pure stands, preferring to grow where there is no competition.
Arceuthobium siskiyouense is a species of dwarf mistletoe known as knobcone pine dwarf mistletoe. It is endemic to the Klamath Mountains of northern California and southern Oregon, where it lives as a parasite on knobcone pine trees. This is a brownish shrub which is visible as a network of scaly stems extending above the bark of its host tree.
The most widespread naturally of the closed-cone pines is bishop pine (Pinus muricata), which can be found along the coast from Humboldt County, California in the north to the northwestern corner of Baja California in the south. Knobcone pine (Pinus attenuata) forests can occur further inland, on dry, rocky soils.
The trees of Closed-cone pine forest burned in every 25–50 years, and a few species including the knobcone pine (Pinus attenuata) are adapted to open the cones and release seeds for new growth following the heat of forest fires. However, as fire regulation and suppression becomes more effective these communities cannot renew themselves.
Pinus aristata - Rocky Mountains bristlecone pine; Pinus attenuata - Knobcone pine; Pinus balfouriana - Foxtail pine; Pinus contorta - Lodgepole pine; Pinus coulteri - Coulter pine; Pinus edulis - Colorado pinyon; Pinus flexilis - Limber pine; Pinus jeffreyi - Jeffrey pine; Pinus lambertiana - Sugar pine; Pinus longaeva - Great Basin ...
On the serpentines of Trinity County's mid-elevation Klamath Mountains, incense-cedar and Jeffrey pine woodlands are inhabited by shrubby Congdon's silktassel, leather oak, and hoary manzanita. Farther west, on the long ridge of South Fork Mountain that divides the Shasta–Trinity and Six Rivers National Forests, the tree form of tanoak grows ...
Norfolk Island Pine Plant Basic Info: Common Name: Norfolk Island pine, Norfolk pine, Australian Pine. Botanical Name: Araucaria heterophylla. Plant Family: Araucariaceae. Type of Plant: Tree ...
Several areas were planted after acquisition by the BLM, including the Bear Trap Creek area (125,000 Douglas-fir trees on 200 acres (0.81 km 2) since 1985.) [18] Other vegetation in the area include knobcone pine, laurel, manzanita, poison oak, blackberry, Oregon grape and salal.