52 BOTANICAL GAZETTE [ JULY 
which had been kept at this temperature in the thermostat for 24 and 
48 hours germinated as usual when removed to the lower temperature, 
A germ-tube is developed at one end of the conidium (jig. 70) and the 
protoplasm begins to flow into it. Soon another tube pushes out, 
usually from the opposite end of the spore, and this is followed by 
others until from two to five tubes have been produced. In nearly all 
Fic, s. Fic. 6. Fic. 7. 
instances there is a slight bulbous enlargement at the origin of each 
tube, much as is Gloesporium nervisequum, but less marked.* 
Growth is comparatively slow, and at 24 hours from the time of 
sowing the germ-tubes are rarely more than twice the length of the 
spore. Even at this early stage, however, the production of secondary 
conidia has begun (figs. SF, f2). "These are generally produced acre 
genously from short lateral outgrowths of the germ-tubes, or of the 
conidium much as described for Gloesporium fructigenum, and for 
. oe + id 
Colletotrichum Sossypu.? ‘The branches are, however, much shorter, ant 
*STONEMAN, BERTHA: A comparative study of the development of some anthrac 
noses. Bor. Gaz. 26:69. pl. 12. 1898. 
? Lbid, 
7 ATKINSON, G. F.: Anthracnose of cotton. Jour. Myc. 6: 173-178. 1891. 
