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 inci-ease 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. 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 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. 



