244 



BOTANICAL GAZETTE 



[OCTOBER 



CARDo's Chromotaxin^ or the YYO^ of the Prang Standard color 



* 



scale. They were coarsely reticulated on the surface {fig. j), owing 

 to their composition of woven, coarse, mycelium threads. In 



diameter they ranged from 102 to 204 ft (the 

 most usual size being about 150 ft). They 

 were round in outline and elevated from 

 the surface, hemispherical. Grown upon 



Fig. 4. — Spores from , , , - , , 



pycnidia gro..^ on cow pea ^^^^ _ ^"^^ ^^^^ ^P^^ the apple agar, the 

 agar. pycnidia were very much darker, almost 



black. The ostiolum seemed entirely absent 

 in many pycnidia which developed deep in the culture medium, 

 but was present in all growing upon the surface of artificial media 

 or upon natural substrata. 



The spores are regular and oblong, or quite irregular-oblong, or 

 swollen and rounded at one end and pointed at the other. Regular- 



"=7E 



(5^ 



Fig. 5. — Stages in the germination of spores; e and }=c and d respectively, drawn 



one hour later; c and d drawn at 6 hours of age, and e and / at 7 hours; m 15 hours 

 old. 



1 

 "4 



i 



i 



oblong, however, is the prevailing type, with a pronounced tendency 

 to irregularity {fig. 4). One septum. 



more 



preparations, is visible in most of the older spores ; though young or 

 small spores and many larger older ones do not show it. The sep- 

 tum is freauentlv central, but fhprp k n tpnrlpnnir fr>r I't tn hp Inra ted 



