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Pinus ponderosa, commonly known as the ponderosa pine, [3] bull pine, blackjack pine, [4] western yellow-pine, [5] or filipinus pine, [6] is a very large pine tree species of variable habitat native to mountainous regions of western North America. It is the most widely distributed pine species in North America.
Due to this deforestation and overharvesting, only about 3% of the original longleaf pine forest remains, and little new is planted. Longleaf pine is available, however, at many nurseries within its range; the southernmost known point of sale is in Lake Worth Beach, Florida. The yellow, resinous wood is used for lumber and pulp.
For its timber, the pine species is regarded as the most commercially important tree in the Southeastern U.S. [5] [6] [7] The common name loblolly is given because the pine species is found mostly in lowlands and swampy areas. [8] Loblolly pine is the first among over 100 species of Pinus to have its complete genome sequenced. As of March 2014 ...
Jeffrey pine wood and ponderosa pine wood are sold together as yellow pine. [6] Both kinds of wood are hard (with a Janka hardness of 550 lbf (2,400 N)), but the western yellow pine wood is less dense than southern yellow pine wood (28 lb/cu ft (0.45 g/cm 3 ) versus 35 lb/cu ft (0.56 g/cm 3 ) for shortleaf pine).
The understory of the ponderosa and sugar pine forest was speckled with manzanita, oak trees and dogwoods with yellow leaves, marking the start of fall. Piles of twigs, pine needles and larger ...
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 ...
Shortleaf pine is a source of wood pulp, plywood veneer, and lumber for a variety of uses. The shortleaf pine is one of the southern US "southern yellow pines"; it is also occasionally called southern yellow pine or the shortstraw pine. The wood from the shortleaf pine is used commercially for creating flooring and beams.
The disease is found on pine trees (Pinus spp.) with two or three needles, such as ponderosa pine, jack pine and scots pine. [2] It is very similar to pine-oak gall rust, but its second host is another Pinus species. The fungal infection results in gall formation on branches or trunks of infected hosts.
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