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- Common names:
- white pine, eastern white pine
- Strobus strobus (L.) Small
- Growth form:
- 22 - 30 m tall, sometimes much larger, trunk diameter to 1 m or more.
- pyramidal to broadly oval-shaped with wide-spreading, horizontal branches.
- greenish, thin, and smooth on young trees, becoming brownish gray, thick, and fissured into rectangular plates.
- slender, orangish brown, slightly hairy, becoming light brown and hairless with age.
- yellowish brown, 0.4 - 1 cm long, egg-shaped to cylindrical, and pointed.
- in clusters of five, pale bluish green, 7 - 12 cm long, sharp-pointed, three-sided with finely toothed edges, straight, thin and flexible. The sheath at the base of each needle cluster is deciduous.
- Pollen cones
- yellow, about 8 mm long, egg-shaped, and clustered at the base of new shoots in the mid-crown.
- Young seed cones
- pinkish purple, 0.6 - 1 cm long, cylindrical, at the tips of new shoots in the upper crown. Pollination between cones occurs in June.
- Mature seed cones
- woody, short-stalked, hanging downward, pale brown with a purple or grayish tint, 10 - 25 cm long, and cylindrical. Scales flexible and lacking prickles. Seeds reddish brown, 5 - 8 mm long, narrow-cylindrical, with a wing nearing 2 cm long.
- Similar species:
- Having soft, five-clustered needles is what distinguishes Pinus strobus from all other Pinus species in the Chicago Region, which have either two or three needles per cluster.
- Habitat and ecology:
- Highly variable, from mesic to dry sites, including bogs, moist woods, wooded slopes, and dunes.
- Regional occurrence:
- Pinus strobus is one of the most generally useful of all American woods. At one time it was the most valuable tree of the Northeast, often used in shipbuilding. Today the wood is used for doors, cabinets, interior finish, lumber, pulp, boxes, matches, and carving. It is planted as an ornamental, but restricted in commercial planting due to the white pine blister rust fungus (Cronartium ribicola) and the white pine weevil (Pissoides strobi).
- Pinus is the Latin word for pine. Strobus is the Latin word for pinecone.
name code: PIST
; page author: The Morton Arboretum
; page date: 2006-12-03
- Further information (external links):
- Flora of North America online treatment
USDA PLANTS Profile, Includes USA map, state map links
[ We can not vouch for content of other websites ]
- Barnes, B. V., and W. H. Wagner, Jr. 2004. Michigan trees: A guide to the trees of the Great Lakes region. Ann Arbor, MI: University of Michigan Press.
- Elias, T. S. 1980. The complete trees of North America. New York: Times Mirror Magazines, Inc.
- Kral, Robert. 1993. Pinus. In Pteridophytes and Gymnosperms. Vol. 2 of Flora of North America north of Mexico. ed. Flora of North America Editorial Committee, 373-398. New York: Oxford University Press.
- Mohlenbrock, R. H. 1996. Forest trees of Illinois. 8th ed. Illinois: Illinois Department of Natural Resources, Division of Forest Resources.