Norton — The Kansas Ustilagineae. 241 



EXPLANATION OF ILLUSTRATIONS. 

 Plates XXV. -XXIX. 



Plate XXV. — 1-5, JJ. Sorghi, after 24 hours in water, X 600. 6-13, JJ. 

 Mays Zeae; 6-8, germination after 22 hours in water, from fresh material col- 

 lected in August, 10 days before germination, X 600 ; 9 » P art of a colony of 

 budding conidia from one spore, in nutrient solution, X 60 °; 10, from one- 

 year-old spores, 48 hours in water, X 400 ; H. 12, air conidia from cultures 

 in moist air only, on glass plate, X 180; 1 3 > air conidia from culture in 

 manure solution, almost exhausted, X 1000. 14-18, JJ. Reiliana, after 3 

 days in water, X 600. 19, JJ. Aristidae from edge of culture in nutrient solu- 

 tion. 20-23, Same in water. 



Plate XXVI. — 1, 2, Germination of JJ. Syntherismae on Panicum proliferum, 

 after several days in nutrient solution, X 500. 3, Spores, JJ. Syntherismae on 

 Andropogon scopariut, X 1000. 4, 5, Spores, JJ. Babenhorstiana, X 1000. 6, 

 7, Spores, JJ. Syntherismae, on Panicum proliferum, X 1000. 8-10, JJ. 

 Syntherismae from P. proliferum, germination in water, X 500. 11-13, JJ. 

 Syntherismae from Cenchrus tribuloides, germination in nutrient solution, 

 after 3 days, X 500. 1*-17, JJ. Andropogonis after 3 days in nutrient solu- 

 tion, X 500. 



Plate XXVII. — 1, 2, Spores, U. Syntherismae on Cenchrus tribuloides, X 

 1000. 3, JJ. Syntherismae, germination of spore from Panicum proliferum, 

 after 5 days in water, X 320. 4, 5, Sorosporium cuneatum in water, X 500. 

 6-8, JJ. Babenhorstiana, after 3 days in nutrient solution, X 500; 7, much 

 swollen promycelia from both ends of the spore. 9-12, JJ. Syntherismae 

 from Panicum capillare, X 500 ; 9, germination from a mass of spores,— the 

 ends at a and b curve downward toward the culture drop surface (water) ; 

 10, formation of knee joints; 11, shows peculiar stalked conidia; 12, old 

 promycelium with conidia, and germ tubes proceeding from knee-joints at 

 a and b, the former passing under a mass of spores at c. 



Plate XXVIII. — 1, JJ. filifera after 4 days in water, X 400. 2, Same 

 species after 48 hours in nutrient solution, X 600. 3, Air conidia (JJ. minor) 

 after 8 days in nutrient solution, spore and ends of long filaments not 

 shown, X 60 °- 4 » 5, IT. filifera, after 18 hours in water, X 500. 6, Same 

 species, after 46 hours in nutrient solution, not a very vigorous specimen, X 

 600. 7, Conidia and germinating spore from culture of JJ. neglecta in 

 nutrient material on open glass slide, X 320. 8, Same culture, germinating 

 spores, X 60 - 9_12 > V- Austro- Americana, in water, X 500. 



Plate XXIX. — 1, JJ. filifera in inflorescence of Bouteloua racemosa. 

 2, 3, Usual appearance of JJ. filamenta on B. racemosa. 4, Same on B. 

 oligostachya. 5, JJ. minor on B. hirsuta. (1-5, Xi-) 6_8 » &• Syntherismae 

 on Andropogon scoparius, in nutrient solution. 9, Portion of old branch of 

 JJ. filifera from culture in nutrient solution, X 500. 10, Spores of IT. 

 filifera, X 500. 11, IT. Boutelouae, old culture in manure decoction, air- 

 conidia grow out in branches at a, X 600. 12, Spores of JJ. minor, X 500. 



Issued November 9, 1S96. 



