PLATE 21 
Helminthosporium monoceras 
A-E.—Conidiophores of H. monoceras arising from imbedded anastomosing my¬ 
celium, showing habit of growth, irregular ramifications and production of conidia 
in racemose arrangement. X500. Drawn from 20-day old culture on tap-water 
agar. 
F.—Outline of conidium from pure culture, showing attenuated regions in periph¬ 
eral wall at apex and at basal end. X500. 
