2i8 The Horticulturist's Rule- Book. 



Crossing. The operation or practice of cross-pollinating. 

 Crown-grafting. Grafting at or near the surface of the 



ground. 

 Cryptogam. One of the class of flowerless plants. These 



plants propagate by spores instead of seeds. Ferns, fungi, 



mosses and sea-weeds are examples. 

 Cutting. A portion of a plant which is inserted in soil 



or water with the intention that it shall grow , slip. 

 Cyme. A flower cluster, flat or convex on top, and in 



which the central flowers open first. 



Deciduous. Said of plants whose leaves fall in autumn. 

 Derivation hybrid. A hybrid between hybrids, or be- 

 tween a hybrid and one of its parents ; derivative hybrid ; 



secondary hybrid. 

 Dibber. See Dibble. 

 Dibble. A pointed instrument used for making holes in 



the ground for the planting of seeds and roots ; dibber. 

 Dioecious. Said of species in which the stamens and 



pistils are borne on different plants. 



Disbudding. The practice or operation of removing buds. 

 Double-graft. A plant twice grafted for the purpose of . 



overcoming the lack of affinity between stock and scion. 

 Double-grafting. The practice and process of twice 



grafting or budding a plant so that the root, the stem or a 



part of it, and the top, shall each represent a different 



variety. It is used when a certain variety will not grow 



upon a given root, but which will grow on some variety that 



unites with that root ; double-working. 

 Double-working. See double -grafting. 

 Drupe. A fleshy or soft fruit formed entirely from the 



ovary, and containing a hard pit ; stone-fruit. The peach 



and cherry are examples. 

 Embryo. The rudimentary plant contained in the seed ; 



seed-germ. 

 Entomology. The science of insects. 



