268 Wisconsin Academy of Sciences, Arts, and Letters. 



Cercospora corn i, n. sp. 



Spots indefinite, pale brown, becoming mottled with purple 

 especially above ; conidiophores hypophyllous, scattered, erect 

 or ascending, brown, septate, 25— 10 x 5-7/a ; conidia apical, ob- 

 clavjitc, bright brown, strongly pluriseptate, 70-1 GO x 5-7/i. On 

 leaves of Cornus paniculata. St. Croix Falls. "Wisconsin, Au- 

 gust 31st, 1914. The conidiophores sometimes spring from the 

 arch of a superficial mycelium and, are then shorter. The af- 

 fected areas which are mostly ^-1 cm. in diameter finally be- 

 come dark and dotted with small, black, globular, sclerotioid bod- 

 ies which are perhaps young pyenidia or perithecia. 



Cercospora arctostaphyli n. sp. 



Spots circular, definite, sordid-arid with a narrow purple bor- 

 der, sometimes confluent, 2-5 mm. ; conidiophores epiphyllous, 

 springing mostly from small, dark tubercles, subhyaline, straight, 

 erect, 7-15 x 3/x ; conidia straight or slightly curved, acute, 

 30-50 x 1-1 y 2 ^. On Arctostapliylos Uva-ursi. Millston, Wis- 

 consin, June, 1914. 



Cercospora echinocystis Ell. & Mart. On Echinocystis lob at a 

 and Sicyos angulatus. Maiden Rock. ]\i these specimens the 

 conidiophores are scattered rather than fasciculate. Conidia up 

 to 185 x 4fx were measured. 



Cercospora effusa (B. & C.) Ell. & Evht. (?). On Lobelia 

 siphilitica. Alma. In this collection the lax, nodulose, tortuous, 

 septate conidiophores arc 75-150,u long; the conidia 30-45^ long, 

 triseptate, becoming brown and constricted at the septa when 

 old. Cladosporium effuswm B. & C. was said to occur on Poly- 

 gonum, punctatum, Lobelia puberula and L. siphilitica and Nab- 

 alus altissimus but Berkeley stated that he had seen conidia <6ali? 

 on Polygon a nu and that they are curved which is not true of thej 

 fungus referred to here. On Fungi Columbiani 2505 (on Lob- 

 elia inflata) 1 find conidia like those in the "Wisconsin collection 

 and also a few slender obclavate ones nearly 100/* long. That 

 the latter were borne on the conidiophores I cannot say. The 

 Fungi Columbiani specimen examined appears to bear a parasite 

 producing small rod-like sporules in pyenidia. The conidio- 

 phores of the Wisconsin collection give off a few branches at or 

 near a right angle. 



