APPENDIX 



451 



traceable to the plants being kept in active growth 

 throughout the year, and consequently being much 

 weakened and rendered very susceptible to the disease. 

 A period of rest in a cold frame results in sturdy, disease- 

 resisting plants. 



CARNATION RUST 



( Uromyces caryophyllinus, Schroeter.) 



A fungus which now and again does a considerable 

 amount of damage to carnations, as it spreads with great 



Fig. 2. — Carnation rust, j., on carnation leaf; nat. size; 

 ■i, teleutospores, X 400; 3, uredospores, x 400. 



