364 . THE COMPLETE GARDEN 



ficially hybridized, then propagated by grafts, buds, cuttings, etc., 

 to preserve in the new plant the desirable characteristics of the parent, 

 which might be lost if grown from seed. 



Host Plant: 



A living plant attacked by a parasitic fungus or supporting a parasitic 

 plant. 



Hotbed: 



A bed of earth enclosed in a glass-covered frame and heated by means 



of fermenting manure placed well below the surface of the soil in the 



hotbed. 

 Humus: 



Vegetable mould or partly decayed organic matter in the soil. 



Hybrid: 



A cross between two species of the same genus or two varieties of the 

 same species. 



Hybrid Tea: 



A section of the Hybrid Perpetual group crossed back upon 

 the tea-scented China rose. They have a lighter green and less 

 wrinkled foliage than the pure Hybrid Perpetual. They are generally 

 less hardy but more continuous in bloom than Hybrid Perpetuals, 

 sometimes blooming from June until frost. 



Hybrid Perpetual: 



Or Hybrid Remontant roses have a stiff upright growth, dull wrinkled 

 foliage, and large flat flowers generally of dark colours. They embrace 

 generally the characteristics of the Provence, Damask, French, and 

 Chinese groups. They mostly have only one season of bloom, in June, 

 but sometimes give scattered bloom later on in the season. 



Hybridization: 



Cross fertilization between plants of different varieties or species and 

 sometimes of different genera. 



Hydrated Lime: 



The compound formed by the action of water or steam on fresh 

 burned lime. Its good physical condition makes even distribution pos- 

 sible, and thus permits maximum effectiveness to be obtained. 



Indigenous : 



Native and original to the country in which the plant is growing. 



