Michigan Trees: A Handbook of the Native and Most Important Introduced Species
c. Bark of trunk red-brown; cones maturing in second season,
about 2 inches long; cone-scales thickened at the apex, but unarmed. _P. resinosa_, p. 15.
Michigan Trees: A Handbook of the Native and Most Important Introduced Species
about 2 inches long; cone-scales thickened at the apex, but unarmed. _P. resinosa_, p. 15.