I06 NATURAL HISTORY BULLETIN. 



them penetrates to the inner cells of the lea\'es. Dr. B. L. 

 Robinson^ has called attention to the remarkable changes of 

 the cellular structure as revealed b}' microscopic stud}'; the 

 spongy parenchyma and epidermal cells becoming compact 

 and palisade-like. 



The asci mature in the earlv summer. They are amphig- 

 enous; 24-32," in length and approach dumb-bell-shape, being 

 constricted at the point of exsertion through the cuticle to 

 6-1 1// while the lower part is 9 21// and the external upper 

 portion 9-14 /i in width. 



The differentiation of a stalk-cell is wanting which separates 

 it from £x(>a.<rns dcfoDUiDis of which it was formerly con- 

 sidered a variety, while the size and shape of the asci are also 

 quite different. The spores are elliptical in form, from 2.5- 

 5,« in diameter. While yet \\ithin the asci numerous yeast- 

 like conidia are found. 



I have examined Taplin'na pnrpiirasccns Robinson; Eco- 

 nomic Fungi 120 a., on leaves of RJms ropdllina, collected at 

 Manchester. Mass.. by W. C. Sturges; Economic Fungi 120 

 b.. collected at Pigeon Cove and Magnolia Mass., by A. B. 

 Seymour: ^[sconiyccs defonuans var. piirpiirasceus, North 

 American Funtji. No. 1886. collected at Newfield. New 

 Jersey. 



ExoAscL's DEFORMANS ( Bcrk. ) Fiickcl. 

 Bibl. and Syn. : 



Ascoiuyccs deformans Berk. 



lIal■kne^^s & Moore '8o. 

 Ellis '85. 

 Peck "85. 



Taphrina defonuaus Tul. 



Farlow '78. Bailej '90. 



Robinson '87. Smith '91. 



Smith '88. Scribner '91. 



Ellis '89. Smith '92. 

 Seymour iK: Earle '90. 



1 Robinson, B. L. Notes on the genus Taplirina. Aini:ils of Bjfa)n\\o\. 

 I, No. II, Nov., 1887, p. 170. 



