284 HORTICULTURIST'S RULE-BOOK. 



Half-hardy (adj.}. A term, applied to plants which need pro- 

 tection 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, 

 provided 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. 



Heeling-in. The process and operation of temporarily cover- 

 ing the roots of plants to preserve them until wanted for 

 permanent planting. 



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. 



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

 garden vegetables, flowers, and ornamental trees and 

 shrubs. 



Horticulturist. One who practices horticulture. 



Hotbed. A frame covered with glass, cloth, or paper, pro- 

 vided with bottom heat, and used for forcing plants. 



Hothouse. A glass house, artificially warmed, in which 

 plants are grown. 



Humus. Vegetable mold. Black or brown earth-like material 

 formed of decayed vegetable and other organic matter. 



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. 



Hy'bridization or hyb'ridization. 1. The state or condition 

 of being hybridized ; or the process or act of hybridizing. 



