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On the coast, the knobcone pine may hybridize with bishop pine (Pinus muricata), and Monterey pine (Pinus radiata). In the western foothills of the Sierra Nevada, knobcone pine is often a co-dominant with blue oak (Quercus douglasii). [7] The species is susceptible to fire, but this melts the cone resin, releasing seeds for regrowth. [4]
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.
Pinus longaeva - Great Basin bristlecone pine; Pinus monophylla - Single-leaf pinyon; Pinus monticola - Western white pine; Pinus muricata - Bishop pine; Pinus ponderosa (syn. P. washoensis) - Ponderosa pine; Pinus radiata - Monterey pine, radiata pine; Pinus remota - Texas pinyon, papershell pinyon; Pinus sabineana - Gray pine, foothill pine ...
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.
Several features are used to distinguish the subgenera, sections, and subsections of pines: the number of leaves (needles) per fascicle, whether the fascicle sheaths are deciduous or persistent, the number of fibrovascular bundles per needle (2 in Pinus or 1 in Strobus), the position of the resin ducts in the needles (internal or external), the ...
Leaf fascicles are present in all pines, and the number of adult leaves (needles) per fascicle is an important character for identification of pine species and genera. Most species have fascicles of 2 to 5 needles; only occasional species typically have as few as one or as many as six leaves to the fascicle.
The Pinaceae (/ p ɪ ˈ n eɪ s iː ˌ iː,-s i ˌ aɪ /), or pine family, are conifer trees or shrubs, including many of the well-known conifers of commercial importance such as cedars, firs, hemlocks, piñons, larches, pines and spruces. The family is included in the order Pinales, formerly known as Coniferales.
Pinus peuce × P. strobus – Balkan pine × eastern white pine; Pinus peuce × P. parviflora – Balkan pine × Japanese white pine; Pinus flexilis × P. wallichiana – Limber pine × Himalayan pine; Pinus flexilis × P. strobus [11] – Limber pine × eastern white pine; Pinus flexilis × P. ayacahuite – Limber pine × Mexican white pine