402 



RESEARCHES ON FUNGI 



fungi grew together. The heads of the s{ilbum-})od'iQS, as we have 

 seen, serve to spread the American Coffee-leaf disease. 



Fig. 201. — Two Nerium Oleander leaves infecte;! witli tlie mycelium of 

 0»iph<iliii Jlavida and bearing numerous gemmifers of the fungus. 

 The leaves were gathered, dipped in 0- 1 per cent, mercuric chloride 

 for 2 minutes, rinsed in sterilised water, and placed in a large 

 crystallising di.sh on moist sand. Each leaf was wounded by 

 scratcliing tlie surface with a sterile needle and tlie wound was 

 tlien inoculated with three or four gemmae. The gemmifers began 

 to appear 10 days after inoculation. The photograpli was taken 

 19 days after inoculation. The fungus strain was of Porto Rican 

 origin. The divergence of the gemmifers from one anotlier can 

 bo observed. Natural size. 



