PLATE 29 
Helminthosporium rostratum 
Aa-q.—Conidia of H. rostratum from dry leaves of Eragrostis major collected near 
Washington, D. C., October 13, 1921, showing variation in size, shape, and septation. 
X 500- 
Ba-d.—Conidia from dry leaf of Eragrostis major germinating in tap water, the mature 
spores (Ba-c) by the production of two polar germ tubes; the newly proliferated spore 
{Bd) by the production of two lateral germ tubes in addition to polar tubes. X 500. 
Ca-h.—Conidiophores showing origin in groups from an expanded base and relation 
of latter to stomata or epidermal cells. X 500. 
