2o6 The Horticulturist' s Rule- Book. 



Ha-ha. A sunken fence. 



Half-Breed. A cross between varieties of the same species ; 

 cross-breed, mongrel, variety-hybrid. 



Half-Hardy (adj.). A term applied to plants which need protec- 

 tion during winter, but which can endure some frost. 



Half-hybrid. The product of a cross between a species and a 

 variety of another species. 



Hand-box. A box of size sufficient to cover a hill of plants, pro- 

 vided with a cover of glass, cloth or paper, used to force plants 

 in the hill. 



Hardiness. Capability to endure a given climate. 



Hardy (adj. ) . Able to withstand a given climate. 



Heart-wood. The inner and colored wood of trees. The deeper 

 color and greater hardness of heart-wood are due chiefly to the 

 deposition of mineral matter in the cells. 



Herb. A plant possessing but a small amount of hard, woody 

 fiber, the stem of which dies at the approach of winter. 



Herbarium. A collection of preserved plants. The plants are 

 usually dried and glued on sheets of paper. 



Heeling-in. The process and operation of temporarily covering 

 the roots of plants to preserve them until wanted for perma- 

 nent planting. 



Horticulture. The art and science of raising fruits, kitchen-gar- 

 den vegetables, flowers, and ornamental trees and shrubs. 



Horticulturist. One who practices horticulture. 



Hotbed. A frame covered with glass, cloth or paper, provided 

 with bottom heat, and used for forcing plants. 



Hothouse. A glass house, artificially warmed, in which plants 

 are grown. 



Hy'brid or hyb'rid. The offspring of plants of different species. 

 Hy'bridism or hyb'ridism. The state, quality or condition of 



being a hybrid ; hybridity. 

 Hy'bridist. One who practices hybridizing. 

 Hy'bridity or hyb'ridity. Hybridism. 



Hybridization or hybridization. The state or condition of being 

 hybridized ; or the process or act of hybridizing. 



Hybridization. The action of the pollen of one species upon the 

 pistil of another species. 



Hybridizing or hyb'ridizing. The operation or practice of cross- 

 ing species. 



