1894]. NATURAL SCIENCES OF PHILADELPHIA. 367 



lary sporules, S. alnicola Cke. has oblong sporules, and S. alnigena 

 Sacc. has no spots. 



Septoria solitaris E. & E. 



On leaves of Rhododendron occidentale, Mill Valley, Cala. , July, 



1893 (W. C. Blasdale, 172). 



Spots amphigenous, i-oun(i^»fhite with a purple boi'der, numerous, 

 about 2 mm. diam. Perithecia mostly one in the center of each 

 spot, globose, 120-150// diam., visible on both sides of the leaf. 

 S[)orules abundant, bacillary, hyaline, continuous, straight or sub- 

 undulate or bent, obtuse, about 20 x 2//. 



Septoria Rhododendrl Cke. has the perithecia aggregated or circi- 

 uate and sporules 40;/. long. 



Septoria (Enanthis E. & E. 



On leaves of (Enanthe sarmentosa, Seattle, Wash., Aug. 1892 

 (Prof C. V. Piper, No. 50). 



Spots scattered, small (1-3 mm.), white, subangular, definite. 

 Perithecia few on a spot (3-6), small (75//.), black (yellow-brown 

 under the microscope), subastomous. Sporules fusoid- cylindrical, 

 hyaline, nucleate, 20-35 x l2-2", ends subacute, slightly curved. 



Septoria saccharina E. & E., var. occidentalis. 



On dead leaves of Acer glahrum, Fairhaven, Wash., Aug. 1892 

 (Prof C. V. Piper, No. 57). 



Differs from the type in having the small, white spots, on which 

 the perithecia are seated, not so evenly distributed over the leaf, but 

 collected on rusty brown, yellow-margined, subindefiuite spots 3-4 

 mm. diam. 

 Septoria circinata E. & E. 



On leaves of Acer circinatuni, Everson, Wash., Aug. 1892 (C. V. 

 Piper). 



Spots orl)icular, scattered, 2-3 mm. diam., pale yellowish-white, 

 definite but without any distinct border. Perithecia amphigenous, 

 few (4-10), subcircinately arranged around the whitish center of the 

 spots, small, 75// diam. Sporules abundant, filiform, variously 

 curved and bent, 30-60x1]//., nucleate, but not septate. Seems 

 quite distinct from the other species on maple. 



Septoria Tecomae E. & E. 



On leaves of Tecoma radicans, Nuttallburg, West Va., Aug. 



1894 (L. W. Nuttall, No. 580). 



