354 Bulletin 73. 



Figs. 37-39, Exoascus confusus Atkinson, on fruits of Prunus 

 virginiana Iv. 37 from Forest Home, N. Y., 38, 39, from 

 Taburg, N. Y. 



Plate XIII. Figs. 40-43, Exoascus communis Sadebeck ? or 

 E. mirabilis var. tortilis Atkinson? From deformed fruits of 

 Prunus americana, cultivated varieties ; 40, 41, 43, Cheny variety, 

 42, Baldwin variety. From Iowa. 



Figs. 44, 45, Exoascus pruni Fuckel on fruit of Prunus domes- 

 tica I,., from Wisconsin. 



Plate XIV. Exoascus longipes Atkinson, on fruit of Prunus 

 americana Marshall. Fig. 46, section showing young hymenium 

 etc., c, cuticle, /?., hymenium, <?/., epidermis, w., mycelium. 47, 

 older hymenium showing the lower ends of the cells making their 

 way in between the cells of the epidermis. 48, 50, 51, mature 

 asci showing the stalk cells penetrating between the cells of the 

 epidermis. 49, showing the successive development of the later 

 hymenium and ascogenous cells. 52, a portion of the fruit where 

 the subcuticular mycelium was not well distributed. From 

 Danby, N. Y. 



Plate XV. Exoascus rhizipes Atkinson, on fruit and bud of 

 Prunus triflora Roxburgh. 53 and 55 from bud, 54, 56, 57, from 

 fruit. Fig. 54 shows the young hymenium with the lower 

 ends of the cells growing down between the cells of the 

 epidermis. In the mature asci specimens are seen the rhizoids 

 growing from the stalk cells. 57 represents some of these grow- 

 ing from the lower part of the ascus. Older fruit bodies have a 

 much greater number of rhizoids. From Auburn, Ala. 



Plate XVI. Exoascus communis Sadebeck. Figs. 58 and 59 

 from fruit of Prunus maritima Wang., Dartmouth, Mass. 60, 

 from fruit of Prunus nigra Aiton, Alma, Mich. 



Plate XVII. Figs. 61, 62, 63, 66, 67, Exoascus mirabilis 

 Atkinson. 61 and 62 (type) from bud of Prunus angustifolia 

 Marshall, Auburn, Ala., 63 from same in Iowa, 66 and 67 from 

 buds of Prunus americana, Iowa. 



Figs. 64 and 65, Exoascus mirabilis var. tortilis Atkinson, on 

 fruit of Prunus angustifolia Marshall, from Auburn, Ala. 



Plate XVIII. 70 and 72, Exoascus mirabilis Atkinson on buds 

 of Prunus hortulaua, E- H. Bailey, from Iowa, 71 same on P. 



