96 



ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 51 



F^iff. 87. — Red pine 

 has two lon», flexible 

 needles (rinht inset) in 

 a bundle. Left inset 

 shows numerous bun- 

 dles of needles attached 

 to the tip portion of a 

 branch. 





ally grown as a low, spreading shrub or as a pyramidal tree 

 which may reach a height of 25 feet. The dwarf form is called 

 mugo pine (Fig. 88) . This is a hardy tree which thrives in stony 

 and dry soil and is resistant to cold. The bright green, twisted, 

 stout needles (Fig. 88 insets) are li/o-3 inches long and crowded 

 two in a bundle. The small, pollen-bearing cones form in clusters 

 at the base of the current season's growth. The mature, tawny- 

 yellow to dark brown, oval-shaped, seed-bearing, cones are 

 34-214 inches long. The bark is gray and scaly. Mountain pine 

 is relatively free of diseases but may be attacked by such insects 

 as pine needle scale and European pine shoot moth. 



Loblolly pine is a tall, straight-trunked tree that may grow 

 to a height of 80-100 feet. It has a compact, round-topped crown 

 composed of short, thick, spreading branches. The upper 

 branches tend to droop downward. The dark green, slender, 

 stiff, slightly twisted needles are 6-9 inches long and in bundles 

 of three. The small, yellow, pollen-bearing cones are clustered 

 at the base of young shoots. The yellow, seed-bearing cones are 

 produced singly or in groups on short stalks. The mature cones 

 are reddish brown, somewhat oval to oblong, and 2-5 inches 



