226 NEW YORK STATE MUSEUM 



HYPODERMEAE 



USTILAGINACEAE 



Ustilago Avenae {Fers.) Jens. 



Oat fields. Wood farm. August. This fungus is parasitic on oats. 



It lives in the oat plant till the panicles appear. Then the fungus makes 



its presence known by developing its own dusty sooty black mass of 



spores in the panicles where the grain or seed of the oats should appear. 



It is an injurious fungus as it destroys many bushels of oats annually. Its 



ravages however can easily be prevented by treating the seed oats by 



the hot water process. This is simply soaking the seed about lo minutes 



in water kept at a temperature of 132 or 133 degrees F. The fungus is 



commonly known as oat smut. f 



UREDINACEAE 

 Uromyces Caladii {Schw.) Farl. 

 Living leaves of Indian turnip. Indian pass trail. June. Only the 

 aecidial form was found. 



Puccinia Prenanthis {Pers ) Fckl. 

 Living leaves of rattlesnake root, Nababis albus. Wallface mountain 

 and Indian pass. June. Only the aecidial form was found. 



Puccinia Violae {Sc/ium.) DC. 



Living leaves of violets. Freemans Home. June. Only the aecidial 

 form was found. 



Puccinia pulchella Pk. 



Living leaves of fetid currant. Valley of the Ausable. Near the 

 Notch house. 



Puccinia Claytoniata {Schw.) 



Living leaves of Carolina spring beauty. Old Keene road. June. 

 This is Puccinia Mariae- Wilso?ii Clinton. The aecidial form was 

 described by Schweinitz under the name AFcidimn claytoniatum. 



Puccinia Asteris Duby. 



Living leaves and generally the basal ones only of the large leaved 

 aster, A macrophyllus. Wood farm. August. 



P. Asteris purpurascens C ^ P. 

 Living leaves of mountain aster, A. acnmitiaius. Indian pass. 



August. 



