274 THE NURSERY-MANUAL 



Ceratostigma. Plumbaginaceoe. 



Increased by divisions, and by cuttings. C. Larpentce is the 

 Plumbago Larpentce of nurseries. 



Ceratozamia. Cycadacece. 



Usually grown from the imported plants. It may be propagated 

 by seeds, when obtainable, and also by offsets. These offsets or 

 suckers arise on the crown when the trunk is injured ; to stimulate 

 them, the center of the plant is sometimes burned out with a hot 

 iron. 



Cercidiphyllum. Trochodendracece. 



Propagated by cuttings made in the summer and from greenwood 

 cuttings taken from forced plants in spring ; by seeds, when pro- 

 curable, sown in spring, or by layers. 



Cercis (Red-Bud. Judas Tree). Leguminosce. 



Propagated by seeds in spring, preferably indoors with bottom 

 heat. May also be increased by layers, and by greenwood cuttings 

 from forced plants in early spring. C. chinensis is grown from 

 soft cuttings in summer under glass. 



Cereus. Cactacece. 



By seeds and cuttings. See Cacti, page 261. 



Cerinthe. Boraginacece. 

 Propagated readily by seeds, in spring. 



Ceropegia. Asclepiadacece. 



Handled by cuttings of green shoots in spring, preferably with 

 bottom heat. 



Ceropteris. Polypodiacece. 



Spores and division. See Ferns, page 312. 



Ce strum, including Habrothamnus. Solanacece. 



Propagated by cuttings in February or early March and inserted 

 in sand in a warm temperature ; by seed, when obtainable. 



Chaenomeles (Japan Quince). Rosacece. 



Propagated by seeds, usually stratified and sown in spring ; by 

 root-cuttings in fall or early spring; also from cuttings of half- 

 ripened wood, under glass, and from layers. Rarer kinds may be 

 grafted on stock of Japanese (Ch. lagenaria) or common quince 

 (Cydonia oblong a) in early spring in the greenhouse. The Japan 



