100 MANUAL OF POISONOUS PLANTS 



in the mature form in considered poisonous ; the same may be said of other 

 puffballs. 



ASCOMYCETES 



Aspergillaceae. 



Aspergillus glaucus Link. 



This fungus is supposed to produce staggers. Frequently found in mouldy 

 hay and gives rise to digestive disorders. Mycotic stomatitis. 



Aspergillus niger van Tieghem. 



This mould also occurs in mouldy hay and other mouldy substances and like 

 the preceding species is injurious. 



Aspergillus fumigatus Fr. 



Commonly found on decaying substances, especially mouldy hay. It is path- 

 ogenic. Found in the ear of man as a parasite. 



Aspergillus flavus Link. 



Also pathogenic. 



Hypocreaceae. 



Claviceps purpurea Fr. 



Found on many different grasses, especially wild rye, cultivated rye, tim- 

 othy and quack grass. Produces a disease known as ergotism. The fungus is 

 very poisonous, causes dry gangrene and abortion. 



FUNGI IMPERFECTI 



Many of the imperfect fungi undoubtedly produce Mycotic stomatitis. 



Oidium albicans Robin. 



Commonly found in the mouth of sucking animals of different kinds, espe- 

 cially calves. Blastomycosis produced by Oidium or Saccharomyces. 



Fusarium equinum Norg. Umatilla horse mange. 



Dr. Mohler and others have demonstrated that the fungus is parasitic and 

 produces this mange. 



Fusarium roseum is commonly found on corn and other mouldy grain. It 

 is probably concerned in forage poisoning. Dr. Burrill and Prof. Barrett report 

 several forms of Fusarium on corn in Illinois. 



Diplodia zeae Lev. 



This disease is widely distributed on the sheaths and blades of corn in the 

 United States. It is reoorted as common in Illinois by Burrill and Barrett and 

 in Nebraska by Heald and Wilcox. It is also common in the state of Iowa. 

 Dr. Erwin F. Smith suggests some connection between pellagra and this mould. 



Sporotrichum Furfur Rob. Favus. 



Sporotrichum tonsurans. Barber's Itch. 



Polythrincium trifolii Kunze. Hclminthosporium gramineum and other fungi 

 may be responsible for mycotic stomatitis. The rape fungus, Polydesmus exii- 

 iosus Kiihn, has long been associated with this disease. 



EMBRYOPHYTA 



PTERIDOPHYTA 



Polypodiaceae. Ferns. 

 Pteris aquilina L. 

 The common brake is found in eastern states and across the continent; 



