216 The Horticulturist' s Rule- Book. 



Bulb, continued. 



the lily ; laminated or tunicated, when composed of more 



continuous and closer-fitting layers, as in the onion. 

 Bulbel. A small bulb borne about a mother- bulb, as in 



some bulbous irises and some onions ; bulbule. 

 Bulblet. A small bulb borne entirely above ground, as 



in the axils of leaves, in the inflorescence, etc. 

 Bulbo-tuber. A corm. 

 Bulbule. A bulbel. 

 Bush. A small woody plant having no central trunk or 



stem ; shrub. 

 Bush-fruit. Small fruits, as the currant, gooseberry, 



raspberry and the like. 

 Callus. The new and protruding tissue which forms 



over a wound, as over the end of a cutting. 

 Calyx. The outer envelope of the flower. The parts, 



when distinct, are called sepals. In apples, pears, etc., 



part of the calyx persists on top of the fruit. 

 Cambium. The layer of new tissue which lies under- 

 neath the bark. It is usually thin and more or less 



mucilaginous in spring and early summer. 

 Cane. A young growth of hard-wooded plants. Usually 



applied to ripened or hardened shoots a year or less old. 

 Cantaloupe. A class of musk-melons characterized by 



firm and warty or scabby rinds. 



Capsule. A dry seed-vessel which splits open at maturity ; 



pod. 

 Carbon dioxide. A gas composed of one atom of carbon 



to two of oxygen. It is heavier than air. and is poisonous 



in large quantities ; carbonic acid gas. 

 Carbonic acid. Carbon dioxide. 

 Carpel. A simple pistil, or one of the divisions of a com- 



ponind pistil. 

 Cavity. In descriptions of apples and similar fruits, the 



depression about the stalk or stem. 



