Norton — The Kansas Ustilagineae. 241 



EXPLANATION OF ILLUSTRATIONS. 

 Plates XXV. -XXIX. 



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

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

 lected in August, 10 days before germination, X^OO; 9, part of a colony of 

 budding conidia from one spore, in nutrient solution, X 600; 10, from one- 

 year-old spores, 48 hours in water, X*00; 11, 12, air conidia from cultures 

 in moist air only, on glass plate, X 180; 13, air conidia from culture in 

 manure solution, almost exhausted, X 1000. 14-18, U. Beiliana, after 3 

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

 tion. 20-23, Same in water. 



Plate XXVI. — 1,2, Germination of U. Syntherismae on Panicum proUferum, 

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

 Andropogon scoparius, X 1000. 4, 5, Spores, U. Babenhorstiana, X 1000. 6, 

 7, Spores, U. Syntherismae, on Panicum proliferumy X 1000. 8-10, XT. 

 Syntherismae from P. proUferum, germination in water, X 500. 11-13, U. 

 Syntherismae from Cenchrus tribuloides, germination in nutrient solution, 

 after 3 days, X 500. 14-17, U. Andropogonis after 3 days in nutrient solu- 

 tion, X 500. 



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

 1000. 3, U. Syntherismae, germination of spore from Panicum proUferum, 

 after 5 days in water, X 320. 4, 5, Sorosporium cuneatum in water, X 50O. 

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

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

 from Panicum capiUare, 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, U. fiUfera after 4 days in water, X ^00. 2, Same 

 species after 48 hours in nutrient solution, X 600. 3, Air conidia {U. minor') 

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

 shown, X 600. 4, 5, U. JiUfera, 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 U. neglecta in 

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

 spores, X 60. 9-12, U. Austro- Americana, in yfSiteT,y(^ 500. 



Plate XXIX. — 1, U. fiUfera in inflorescence of Bouteloua racemosa. 

 2, 3, Usual appearance of U. Jilamenta on B. racemosa. 4, Same on B. 

 oUgostachya. 5, U. minor on B. hirsuta. (1-5, XiO 6-8, U, Syntherismae 

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

 U. JiUfera from culture in nutrient solution, X 500. 10, Spores of U. 

 fiUfera, y^SOO. 11, U. Boutelouae, old culture in manure decoction, air- 

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



Issued November 9, 1S96. 



