Norton — The Kansas Ustilagineae. 237 



Germination * in water in about 12 hours. A short promy- 

 celium is produced in a few hours and soon bears a small 

 conidium on the end and then a few lateral ones. The conidia 

 are short and sometimes stalked. Air conidia produced in 

 older cultures. 



20. U. pustdlata Tracy & Earle, Bull. Torr. Bot. Club, 

 1895, p. 175. (!) 



On Panicum proliferum, Pottawatomie Co. (F. F. Creva- 

 couer.) 



Attempted germination was unsuccessful. 



21. U. filifera n. sp. (Plate XXVIII. 1, 2, 4-6; Plate 

 XXIX. 1-4, 9, 10.) 



On Bouteloua racemosa and B. oligostachya, Riley and 

 Wabaunsee Co. f 



Produciog rounded protruding swellings §—2 mm. wide and 

 1-12 mm. long on the leaves and sometimes stems of the host 

 plant. Spores irregularly angled, subglobose, dark yellow- 

 ish brown, rather opaque, black in mass, minutely echinulate, 

 contents granular, 13X15 ii in diameter. 



The germination in water in favorable cases begins in about 

 12 hours. The usual manner is to form long septate tubes 

 (about 300 ll long, the cells 2-3 ti X 6-10 ti) which grow 

 rapidly in length for two or three days, these produce a few 

 conidia and usually branch some. The branches near the 

 spore have a tendency to grow backward in a peculiar manner. 



In nutrient solutions more abundant conidia are produced. 

 These vary from fusiform to almost spherical. Chains of air 

 conidia were sometimes seen. These conidia vary in length 

 as the others, but are usually shorter. The conidia are at first 

 smaller at the apex, then bud off secondary conidia at the 

 end, grow larger themselves and finally become septate, the 

 whole chain of conidia forming a long irregular branch of 

 short thick cells bearing small conidia at the sides (fig. 9, 

 Plate XXIX.) In old cultures some of these cells become 



* See Kell. & Swing., Jour. Myc, 1889, p. 12. 



f Specimens also on Bouteloua sp. collected in Mexico in 1880 by Dr. E. 

 Palmer, in Herb. Mo. Botanical Garden. 



