Smithsonian Report, 1919. — Coville. 
Plate 10. 
Dormant Wild Crab Stimulated to Growth by Pruning. 
This plant had remained dormant in the warm greenhouse during the fall and winter at 
a temperature of 55° to 70° F. On April 5 three branches were pruned, and on April 
24, when the photograph was taken, the uppermost bud on each of the pruned 
branches had begun to grow. On other, impruned plants no bud growth had^ taken 
place. (Two-thirds natural size.) 
