358 THE COMPLETE GARDEN 



Clay: 



Earthy material (occurring in nature), whose chief property is plasticity 

 when wet. The size of particles varies from 1-5000 to 1-25000 of an 

 inch in diameter. Bakes and cracks freely when dried out. 



Clay Loam: 



A loam soil containing a predominance of clay. 



Clump: 



A cluster of roots or bulbs or tubers capable of being divided into 

 separate plants or of producing one large mass of plants resembling a 

 single plant. 



Collected Stock: 



Plants which have been taken from their native habitat and shipped 

 direct from the collecting ground to the new location. These require 

 more care and are subject to greater loss than nursery-grown stock. 



Cold Frame: 



An unheated, outdoor, covered plant house, generally covered with 

 glazed sash; but sometimes prepared paper or cloth is used. No ma- 

 nure is used in the soil at bottom of a cold frame. Cold frames are most 

 frequently used as a transition space in the hardening-off process. 



Compost: 



A soil made by mixing loam with decaying organic compounds and some- 

 times inorganic fertilizers, allowing nitrification and oxidation to 

 proceed; but preventing plant growth until a very rich soil is produced. 



Congested: 



A term applied in planting to a situation having impure air or 

 restricted feeding area for roots, or both. 



Conifer: 



A plant which bears its seeds in a cone. With the exception of the 

 ginkgo, the larches, and the bald cypress practically all conifers are 

 evergreen needle-bearing plants, as the pine, spruce, and fir. (See 

 Evergreen.) 



Cover Crop: 



A herbaceous crop sown to cover the ground temporarily and thus 

 protect it from atmospheric and water action; generally plowed under 

 for its fertilizing value. 



