Extension Forestry

White Pine - Pinus strobus

leaf

The white pine is a large, straight-stemmed tree with a pyramidal crown.  It grows 50 to 100 feet tall in Iowa.  It is native in restricted localities in northeast Iowa, usually where there are limestone outcroppings and porous soils with good internal drainage.

The leaves are needles 3 to 5 inches long, bluish green on the upper surface, whitish beneath and occurring in bundles of five. The needles remain on the tree for two years.

The cone is slender, gradually tapering, 3 to 6 inches long withthe ends of the cone scales prominently light tan to whitish and smooth.Cones are fully grown in the summer of the second season, opening to discharge seed that autumn.

On small branches and twigs, the bark is smooth.  On older branches and the trunk, it breaks into broad, flat topped ridges and is dark gray.
 


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Contact: Paul Wray

Last Update: January, 2001