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Published In: A Description of the Genus Pinus 1: 7, pl. 3. 1803. (Descr. Pinus) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced


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1. Pinus banksiana Lamb. (jack pine) Pl. 21j,k,l; Map 73

Trees to 10(–25) m tall. Trunks with reddish brown to dark gray bark, the surface breaking into scaly plates. Twigs orangish brown to reddish brown, glabrous, often glaucous, turning gray to reddish brown with age. Leaves in fascicles of 2, 2–4 cm long, with 2 vascular bundles, relatively stiff, persisting 2–3 years. Fascicle sheaths usually persistent. Cones 3–5 cm long, tan to light brown or yellowish brown, narrowly ovoid, asymmetrical, curved or arched to the side (most easily seen before dehiscence), the scales not shiny, mostly lacking spines, sometimes with a minute, curved spine near the tip. 2n=24. Pollen shed March–May.

Introduced, reproducing locally in and around plantings scattered throughout the state (native to the northeastern U.S. south to Illinois and Pennsylvania, Canada; widely introduced to the south of its native range). Widely planted for wildlife habitat, less commonly as an ornamental.

This species has a scrubby, irregular growth form, and it is not usually planted as a windbreak or in plantations but rather as an ornamental or for erosion control. In its native habitat, the cones often remain closed at maturity for several years until fire stimulates the release of the seeds.



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