102 Wisconsin Academy of Sciences, Arts, and Letters. 



sporules 8-10 x 2^-3^. The pycnidia are epiphyllous on spots 

 1-2 cm. long which are sordid-arid with a purple border above, 

 olivaceous below. I use this name for convenience until the re- 

 lationship of the fungus to the various species that have been 

 described on Caprifoliaceae is known. 



Ascochyta caulicola Laubert (Ascochyta lethalis Ell. & Barth.) 

 On living stems of Melilotus alba. Madison (A. II. Gilbert). 



Stagonospora paludosa (Sacc. & Speg.) Sacc. On Car ex re- 

 trorsa. Athelstane. 



Septoria betulicola Pk. The common Septoria on Betula in 

 Wisconsin, first manifests itself by the formation of small 

 (l-2mm.) scattered, angular, intervenular, black brown spots 

 which are lighter colored below. These spots become surrounded 

 by an indefinite yellow discoloration which later becomes of a 

 more or less reddish brown above and light brown or buff below. 

 These run together into indefinite areas usually 1-2 cm. in di- 

 ameter. On the lower surface of these areas the usually few and 

 scattered pycnidia are borne. These are subepidermal, globose, 

 thick-walled, about 100/x in diameter. The sporules are straight 

 to strongly curved, spuriously pluriseptate, 40-60x11/0-2^. 

 This is the form that is usually distributed under the name Sep- 

 toria betulicola Pk. although North American Fungi 2nd series, 

 2166 which resembles it was issued as Septoria betidae (Lib.). 

 Other specimens show smaller (ca. 5mm.) darker, more defi- 

 nitely limited areas which become cinereous above. Septoria 

 betulicola apparently has not been reported in any of the Wis- 

 consin lists. The characters of the sporules seem to ally this 

 with Septoria betulina Pass. Septoria betidae (Lib.) West, 

 was reported in the supplementary list 402a. The specimen 

 upon which this record was based (Three Lakes, June 25th, 

 1892) bears circular light yellowish brown spots 1-2 mm. in di- 

 ameter with a definite dark brown border. The pycnidia are 

 epiphyllous but visible below, globose, thick-walled, about 80^ in 

 diameter; the sporules straight or curved, triseptate, 30-40x2/* 

 Fungi Columbiani 1586 on Betula occidentalis, collected in Ore- 

 gon and issued as Septoria betulicola Pk. seems to differ from 

 this only in the more irregular spots and the much paler and less 

 distinct border. 



