Pine
Pines are evergreen conifers with needles in bundles and woody cones.
Pines are coniferous trees or shrubs in the genus *Pinus*, the sole genus of the subfamily Pinoideae within the family Pinaceae. They are evergreen, resinous plants with needle-like leaves bundled in clusters, typically of two to five needles per fascicle, and produce seeds in woody cones, with two seeds on each cone scale. Pines are widely distributed across the Northern Hemisphere, dominating large areas of taiga and occurring in diverse habitats including Mediterranean regions and dry tropical forests in southeast Asia and Central America. Some species are fire-resistant or fire-dependent. They provide extensively used timber, edible pine nuts, and resin used for flavoring retsina wine. Pines are long-lived, often reaching 100 to 1,000 years, with the Great Basin bristlecone pine (*Pinus longaeva*) being the oldest; one individual known as "Methuselah" in California is around 4,800 years old, and a nearby tree, now cut down, was dated at 4,900 years. Most pines have thick, scaly bark, though some have thin, flaky bark. Their branches grow in tight spirals that appear as whorls, with some species producing one whorl per year and others producing two or more. The leaves appear in four types: seed leaves (cotyledons) on seedlings, juvenile leaves, scale leaves, and the adult needles. Needles persist from 1.5 to 40 years depending on the species. Pines are monoecious, with small male cones that shed pollen in spring and larger female cones that take 1.5 to 3 years to mature. The seeds, or pine nuts, are mostly small and wind-dispersed, though some larger seeds are bird-dispersed. In serotinous species, cones are sealed with resin and open only after a fire, releasing seeds onto burned ground. The genus *Pinus* was named by Carl Linnaeus in 1753, with Scots pine (*Pinus sylvestris*) as the type species. The modern English name "pine" derives from Latin *pinus*, traced to an Indo-European root meaning "resin." The genus first appeared in the Early Cretaceous, with the oldest verified fossil, *Pinus yorkshirensis*, dating to around 130–125 million years ago from England.
- Scientific name
- Pinus
- Family
- Pinaceae
- Subfamily
- Pinoideae
- Tallest species
- Sugar pine (Pinus lambertiana) at 83.45 m
- Native range
- Northern Hemisphere
Lore & Background
Pines are evergreen, resinous trees or rarely shrubs, reaching heights from a few meters to over 80 meters, with the tallest recorded specimen being a sugar pine in Yosemite National Park. They are long-lived, typically surviving 100 to 1,000 years, and the oldest known individual, a Great Basin bristlecone pine nicknamed "Methuselah" in California's White Mountains, is approximately 4,800 years old. The bark is generally thick and scaly, though some species have thin, flaky bark. Branches grow in tight spirals that appear as whorls, with some species producing one whorl per year and others producing two or more. Pines have four distinct leaf types: seed leaves (cotyledons) on seedlings, short-lived juvenile leaves, small non-photosynthetic scale leaves, and the adult needles. These needles are bundled in clusters called fascicles, typically containing two to five needles but ranging from one to seven per fascicle. Needles persist on the tree for 1.5 to 40 years, depending on the species. Pines are monoecious, bearing both male and female cones on the same tree. Male cones are small and short-lived, while female cones take 1.5 to 3 years to mature and range from 3 to 60 cm in length. Each fertile cone scale holds two seeds, which are often winged for wind dispersal; some species produce larger, wingless seeds dispersed by birds. Many pines exhibit serotiny, where cones remain closed for years until triggered to open by an environmental cue, most commonly fire, which melts the resin binding the scales. This adaptation allows seeds to colonize recently burned ground with little competition.
Reader's Guide
Pines are among the most economically and ecologically important tree genera. Their timber is extensively used worldwide, and their seeds—pine nuts—are harvested for culinary uses such as pesto. Pine resin flavors retsina wine. Ecologically, pines dominate vast boreal forests and are adapted to many environments, including fire-prone regions; some species are fire-resistant or fire-dependent, with serotinous cones that open only after fire to release seeds onto cleared ground. The genus has a complex evolutionary history marked by hybridization, wind pollination, and weak reproductive isolation. Pines are divided into two subgenera: hard pines (subg. Pinus) with resin-sealed cone scales and persistent needle sheaths, and soft pines (subg. Strobus) without resin seals and with deciduous sheaths. Mexico holds the highest species diversity. Pines have been introduced to temperate and subtropical regions worldwide, where some species have become naturalized or invasive.
Did You Know?
- Pine needles are bundled in clusters called fascicles, usually numbering two to five per fascicle.
- Some pines have serotinous cones that open only after a forest fire melts the resin binding them shut.
- The tallest pine is a sugar pine in Yosemite National Park, reaching 83.45 m.
Frequently Asked Questions
What is Pine?
Pine refers to the genus Pinus, a group of evergreen coniferous trees and shrubs recognized by their needle-like leaves that grow in tight bundles and their woody seed cones. They are the sole genus in the subfamily Pinoideae within the family Pinaceae.
What is the tallest pine species?
The sugar pine (Pinus lambertiana) holds the record at 83.45 meters tall. It is native to the Pacific coast regions of western North America.
Why are pines important to humans?
Pines supply widely used timber for construction and manufacturing, as well as edible seeds commonly called pine nuts. Their resin has also been a valued ingredient for centuries, most notably in flavoring retsina wine.
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