Bul. 1347, U. S. Dept. of Agriculture PLATE IV 
OPHIOBOLUS GRAMINIS ON WHEAT 
A, Mycelial plate from underground leaf sheath, 450; B, necks of perithecia projecting 
through basal sheath of wheat plant affected with take-all, X20; C, perithecium on under 
side of basal wheat leaf sheath and free asci and ascospores, X135 
