REPORT OF THE STATE BOTANIST I9IO 63 



Closely related to S e p t o r i a f i c a r i a e Desm. but differ- 

 ing in the color of its spots and in its larger and black perithecia, 

 fewer on a spot, and in its different host plant. 



Maculae amphigenae, suborbiculares, in folio quoque vulgo unus 

 vel duo, pallidae; perithecia, pauca, epiphylla, 100-150 /^ in diam,, 

 atra ; sporae filif ormes, rectae vel curvulae, hyalinae, 25-40 x 1-2 //-. 



Septoria samarae 



Perithecia minute, 80-120 [j- in diameter, numerous, amphigenous, 

 occupying the whole wing of the fruit, superficial, black; 'spores 

 filiform, curved or rarely flexuous, hyaline, 22-44 -" long, 1.5-2 

 broad. 



Wing of the fruit of box elder, Acer negundo L. and the 

 dwarf mountain maple, Acer glabrum Torr. Morrison, 

 Colorado. September. E. Bartholomew. Collected by E. Bethel. 

 Golden, Colorado. E. Bethel. 



The wings have lost their green color, but the covering of the 

 seed is still green. 



Perithecia minuta, 80-120 « in diam., numerosa, amphigena om- 

 nino fructus alam occupantia, superficialia, atra; sporae filiformes 

 curvatae vel rare flexuosae hyalinae 22^44 x 1.5-2 [x. 



Sphaeromyces delphinii 



Subiculum of few radiating branched colored hyphae; sporo- 

 phores short, very dense; spores catenulate, oblong or subfusiform, 

 forming a dense subglobose brown or black mass, subhyaline by 

 transmitted light, 8-12 /-/-long, 1.5-2 p- broad. 



Dead stems of western larkspur. Delphinium o c c i - 

 d e n t a 1 e Wats. August. Salt Lake co., Utah. E. Bartholomew. 

 Collected by A. O. Garrett. 



In the spore character this species does not agree well with the 

 character of the genus to which it is here referred, but it seems 

 better to place it here than to make a new genus for its reception. 

 Both it and the species on which the genus was founded are mani- 

 festly very rare. In some of the specimens the sporodochium ap- 

 pears to sit upon a gelatinous film which at length becomes black- 

 ened by a layer of the fallen spores. 



Subiculum hyphis paucis, radiantibus, fuscis, sparse ramosis com- 

 positum ; sporophori breves, densissimi ; sporae catenulatae oblongae 

 vel subfusiformes, massam subglobosam densam fuscam nigramve 

 formantes, subhyahnae sub lente, 8-12 x 1.5-2 /-/-. 



