115 
lated forms as H. Nos. 3, 13, 16, etc. That the internal structure of Hel- 
minthosporium conidia has not been clearly understood is shown by nu- 
merous published figures. 
Conidial germination.—The conidia germinate readily in water, in 
hanging drop, or on the surface of wheat shoots (Fig. 12), and germination, 
Fic. 12.—Germinating conidia of H. No. 1 
so far as I have seen, is very rarely lateral but usually from the ends, most 
commonly from the basal end. Thus twenty-seven basal germinations 
were counted as against fourteen apical ones. The germ-tube is hyaline, 
richly filled with protoplasm, and forms abundant branches and septa 
(Fig. 12). Bakke (6) states that ‘germ tubes first come from basal and 
apical cells; later other germ tubes may arise from the remaining cells under 
favorable conditions.” Kirchner (72) states that germination in H. gramin- 
eum is usually terminal, but Noack (87) shows that for this species the 
germ-tubes are as often lateral. The viability of the protoplast was not 
injured by crushing the epispore; indeed such cracking seemed to facilitate 
emergence of the germ-tube. Anastomosis of the germ-tubes is not uncom- 
mon (Fig. 13). As the germ-tube enlarges there is frequently, though not 
