Bui. 1061, U. S. Dept. of Agriculture 
Plate I 
Fig. 1. — A heavy crop of longleaf pine cones 
bearing seed occurs widely over the South 
at intervals of about seven years. The 
flowers " set " early in the spring ; the seeds 
require two years to mature, and are usu- 
ally shed in September. Seed crops can thus 
he 'foretold more than a year ahead by ob- 
serving the small green cones on the trees in 
the summer and fall during their season 
of development 
Fig. 2. — Foliage and cones ("burrs") of the longleaf pine 
