Glossary. 



203 



Corolla. The inner envelope of the flower. The parts, when dis- 

 tinct, are called petals. 



Corm. A solid bulb-like tuber, as in the gladiolus and crocus ; 

 bulbo-tuber. 



Corymb. A flower-cluster which is flat or convex on top and in 

 which the outer flower blooms first. 



Cotyledon. A small leaf borne in the seed ; seed-leaf. In many 

 plants the cotyledons rise to the surface when the seed germi- 

 nates, and increase in size. 



Cross. The offspring of any two flowers which have been cross- 

 fertilized. 



Cross-breed. A cross between varieties of the same species; 

 half-breed, mongrel, variety-hybrid. 



Cross- fertilization. The action of pollen upon the pistil of 

 another flower of the same species. Cross-fertilization is com- 

 monly used to denote the mere conveyance of pollen — pollin- 

 ation — but better usage confines the term to the action of pollen 

 upon the pistil. 



Cross-pollination. The conveyance of the pollen to the stigma of 



another flower. 

 Crossing. The operation or practice of cross-pollination. 

 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. Perns, 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 between 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. 



