Dearness: North American Fungi 357 



34, 1888, on Smilax hispida at Lincoln, Nebraska, fails to reveal 

 any pycnidial wall. Irregular acervuli develop just beneath the 

 cuticle rupturing it sometimes at more than one point. Conidia 

 with nuclei half to three fourths of their size, oblong with rounded 

 ends, 9-20 X 6-7 /x, mostly 16X6^, are mixed with enucleate, 

 subinequilateral ones 7-10 p wide. 



35. Marssonina bracteosa Dearn. & Barth. sp. nov. 



On arid, brownish areas of the leaves and discolored petioles, 

 not definitely limited. Acervuli yellowish, epiphyllous, seated on 

 the veins and veinlets, .1-2 mm. Spores hyaline, in hemispheric 

 masses, mostly 1 -septate, some of them continuous or septum not 

 discernible, 4-8 X 2-2.5 j"- 



On living leaves of Ribes bracteosum Dougl., affected with 

 Gloeosporium Bartholomaei Dearn., Fungi Columb. 5022, the 

 acervuli as well as the spores of the latter being much larger than 

 those of the Marssonina. Port Orchard, Wash., July, 191 2, E. 

 Bartholomew 4763 (a). 



36. (?) Septogloeum Nuttallii Hark. 



The following description was written out under the proposed 

 name Cylindrosporium Osmaroniae sp. nov. ; but it seems to be 

 very close to Septogloeum Nuttallii Hark. Jour. Myc. 1 : 117, if not 

 identical with it. 



An affected part of the leaf is somewhat paler than the ad- 

 jacent area and when such part is held to the light and examined 

 with a lens the acervuli are visible as opaque dots each surrounded 

 by a narrow translucent ring. These may become confluent and 

 appear as brown spots 2-3 mm. in diameter. Acervuli amphig- 

 enous but mostly hypophyllous, 50-100 /a in diameter, usually 

 more prominent at the margin than in the center, yellowish, re- 

 sembling young uredosori. Conidia hyaline, i-several-septate, 

 mostly 1 -septate, usually multinucleate, subarcuate and subacute, 

 30-50 fi, mostly 45 X 3/^. 



On living leaves of Osmaronia cerasiformis (T. & G.) Greene, 

 Vancouver Island, July, 1916, John Macoun 933. 



