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Three-year reproductive cycle: Three of the conifer species are pine species (Pinus pinea, Pinus leiophylla, Pinus torreyana) which have pollination and fertilization events separated by a two-year interval. Female strobili initiated during late summer or autumn of a year, then overwinter until the following spring.
The fire cycle for ponderosa pine is 5 to 10 years, in which a natural ignition sparks a low-intensity fire. [50] Low, once-a-decade fires are known to have helped specimens live for half a millennium or more. [14] The tree has thick bark, and its buds are protected by needles, allowing even some younger individuals to survive weaker fires. [14]
A pine is any conifer tree or shrub in the genus Pinus (/ ˈ p aɪ n ə s /) [1] of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae . World Flora Online accepts 187 species names of pines as current, with additional synonyms, making it the largest family among the conifers. [ 2 ]
Australes. Engelm. Pinus elliottii, commonly known as slash pine, [2][3] is a conifer tree native to the Southeastern United States. Slash pine is named after the "slashes" – swampy ground overgrown with trees and bushes – that constitute its habitat. Other common names include swamp pine, yellow slash pine, and southern Florida pine. [3]
The longleaf pine is the official state tree of Alabama. [30] It is referenced by name in the first line of the official North Carolina State Toast. [5] [31] Also, the state's highest honor is named the "Order of the Long Leaf Pine". The state tree of North Carolina is officially designated as simply "pine", under which this and seven other ...
Pinus banksiana ranges from 9–22 m (30–72 ft) in height. Some jack pines are shrub-sized, due to poor growing conditions. They do not usually grow perfectly straight, resulting in an irregular shape similar to pitch pine (Pinus rigida). This pine often forms pure stands on sandy or rocky soil. Many populations are adapted to stand-replacing ...
Pinus rigida, the pitch pine, [2] [3] is a small-to-medium-sized pine. It is native to eastern North America , primarily from central Maine south to Georgia and as far west as Kentucky. It is found in environments which other species would find unsuitable for growth, such as acidic, sandy, and low-nutrient soils.
A young female or seed cone on a Norway spruce (Picea abies) Immature male or pollen cones of Swiss pine (Pinus cembra) A conifer cone or, in formal botanical usage, a strobilus, pl.: strobili, is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads. They are also called, according to the relevant genus, cypress cone ...