294 THE NURSERY-MANUAL 



quickly if sown in warm weather or in a warm house. The cucurbits 

 are frost-tender. Seeds retain their germinating qualities for a 

 number of years. Special kinds may be increased by cuttings, 

 which root quickly in brisk heat. 



Cunninghamia. Pinaceoe. 



Propagated by seeds ; also by cuttings of growing wood in late 

 summer under glass. For symmetrical specimens, cuttings should 

 be taken from leading shoots on strong branches or from short 

 shoots arising on the old wood. 



Cuphea. Lythracece. 



Usually grown from seeds, the plants being treated as annuals. 

 The more shrubby kinds, as C. ignea, are grown from cuttings of 

 firm wood. 



Cupressus (Cypress). Pinacece. 



Handled as are the species of chamsecyparis, by cuttings and 

 seeds. 



Curculigo. Amaryllidacece. 



Propagated by seeds ; also by suckers from the base of the stem. 

 Before potting, place the pieces in the sand-bed of a warm prop- 

 aga ting-house for a few days. 



Curcuma. Zingiberaceoe. 



Increased by division of tubers or roots in spring. 



Currant (Ribes vulgare, R. nigrum and R. odoratum). Saxifragacece. 



New varieties are originated from seeds, which may be sown in the 

 fall or stratified until spring. They are planted in a well-protected 

 and carefully prepared seed-bed, and usually grow readily. Bear- 

 ing plants should be had in three or four years. 



Commercial varieties are nearly always multiplied by hard- 

 wood cuttings. The cuttings may be taken in spring and placed 

 directly in the ground, but better results are obtained by taking 

 them in the fall or late summer. Many nurserymen prefer to take 

 them in August, strip off the leaves, and bury them in bunches with 

 the butts up. They may remain in this condition or in a cellar all 

 winter, or they may be planted in the fall. Currant cuttings strike 

 readily, however, under any method. Some growers cut out the 

 buds that stand below the surface of the ground, to prevent 

 suckering, but this is not generally practiced ; the suckers are cut 



