Dearness: North American Fungi 363 



Fungi Columb. 5006. This may be only a host variety of the pre- 

 ceding or vice versa. 



48. Cercospora Streptopi Dearn. & Barth. sp. nov. 



Spots yellowish, irregularly oblong, 2-5 mm., bounded by the 

 veinlets, becoming confluent and turning brown. Hyphae 15^, 

 on pale, later becoming dark, tubercular bases, mostly hypophyl- 

 lous. Conidia abundant, 20-63 X 5-5-6/*, 1-7-septate ; they and 

 the fertile hyphae pinkish and imparting to the lower side of the 

 leaf a decidedly pinkish hue. 



On living leaves of Streptopus amplexifolius (L.) DC, Ducka- 

 bush River, Wash., Aug., 1912, E. Bartholomew 4857. Type col- 

 lection, Fungi Columb. 3004. 



49. Helminthosporium repente Dearn. & Barth. sp. nov. 



Extensively creeping and proliferating over the bark, — dark, 

 olive-brown hyphae 5-8 thick, cells 6-1 5 tt long; conidiophores 

 or fertile branches, narrower and paler than the conidia and with 

 longer cells. Conidia sub-oblong, 5-12-septate, dark-brown, 

 nearly opaque throughout, horizontal or ascending, mostly 40- 

 45 X 8-9 \x, when mature, exceptionally reaching 60 /x in length, 

 septa 4-6 fju apart. 



On bark of dead Acer grandidentatum Nutt, Red Butte Can- 

 yon, Utah, June, 191 3, E. Bartholomew §826. 



50. Fusarium gleditsiaecolum Dearn & Barth. sp. nov. 



Sporodochia salmon-colored, white below the conidiophorous 

 layer, erumpent through the cuticle, seated on the cortex which 

 assumes a reddish tinge on the surface adjoining the wood. 

 Sporules arcuate, hyaline, 1-3-septate, 30-45 X 3-4 ^ on more 

 or less branched conidiophores forming a layer 30-100 /x in depth. 



On dead Gleditsia triacanthos, L., Stockton, Kansas, May, 1914, 

 E. Bartholomew 5554. 



F. scolecoides Sacc. & Ellis, which this resembles, has 5-septate 

 sporules, 70-80 ^ in length. 



51. Fusarium Macounii sp. nov. 



Sporodochia gregarious, whitish with carneous tinge, erumpent- 

 superficial, depressed, irregularly circular to elliptic, walled 



