GLOSSARY 363 



of three or more guys on trees recently transplanted to hold them 

 firmly in place until an adequate root system has been established, 

 and to prevent swaying of the trees and loosening of root system. 



Hammock Land: 



Land, mostly in the southern part of Florida, covered with luxuriant 

 growth of trees (hardwoods, or cabbage palms and palmettos). The 

 soil is rich in fertilizer value. 



Harden-off: 



To so care for plants previously grown in a greenhouse that they will 

 be able to withstand normal outdoor exposures. It is customary to 

 move such plants from the greenhouse to cold frames. 



Heave-out: 



The partial lifting of plants out of the soil by frost action. This is 

 apt to occur when ground previously deeply frozen and thawed out 

 on top is again frozen. The layer of frozen soil beneath, which has 

 not yet thawed out, forms an unyielding barrier and the expansion 

 of the soil in freezing is then wholly upward. The stresses thus caused 

 are enormous and plants are lifted sometimes almost wholly out of 

 the ground. 



Hedge: 



A row composed of living plants usually in a straight line and planted 

 closely to each other (See Plate XV, Page 95). 



Hedgerow: 



A hedge or fence of bushes or shrubs either in the form of a definite 

 hedge or of an irregular border-planting, of varying width and often- 

 times varying types of plants. 



Heeling-in: 



Placing plants with roots covered with soil pressed down with the heel 

 or toe to preserve them in a dormant condition for short periods until 

 they can be permanently planted. Usually a deep furrow is dug, the 

 roots placed close together in the furrow, with stems in a slanting posi- 

 tion, and roots then covered with soil. The soil used in this covering is 

 taken from the furrow of the next row (See Plate VI, Page 34). 



Herb: 



A plant with no persistent stem above ground. 



Horticultural Variety: 



Said of certain varieties of plants developed because of some desirable 

 characteristic. They are not necessarily hybrids, but usually are arti- 



