PAPERS OX BIOLOGY AND AGRICULTURE 127 



at their disposal at the earliest possible date. It is hoiked 

 that opportunity will be offered in the near future to 

 prepare for publication a larger number of new species. 



Septoria Collinsiae n. sp. Spots numerons, large 2-10 

 mm., single or continent, often involving entire leaf, gray- 

 ish white, snborbicnlar. Pycnidia strictly epiphyllons, 

 acicnlar, straight or slightly curved 1-3 septate 2.5-3x25- 

 50 microns. Mostly 3x30-40 microns. 



The spore measurements agree closely with those of 

 5'. Scrophiilariae Pk. but the character of the spots and 

 the distribution and number of the pycnidia is quite dif- 

 ferent in the two species. S. ScrophuJariae is a very 

 common parasite on species of Scrophularia in this lo- 

 cality. 



On CoUinsia verna Xutt. Brownfield Woods near 

 Trbana, Illinois, Mav 18, 1919, Mav 10, 1920, April 25, 

 1921. 



Type Xo. 1723, Herbarium Illinois Plant Disease Sur- 

 vey. 



This leaf spot was so abundant that it caused the 

 death of large patches of the host. It is strange that 

 this serious disease has escaped the attention of collec- 

 tors in this region. 



Septoria septentrionalis n. sp. Spots numerous, small, 

 indefinite, often confluent, brown, later with white indefi- 

 nite centers. Pycnidia epiphyllons rarely amphigenous, 

 few, scattered, brown, thin walled, 60-80 microns. Pycno- 

 spores very short for this genus, narrowly fusoid, 

 straight or slightly curved, ends blunt, 1 septate or 

 continuous 2.5-3.5x15-25 microns. Differing from S. 

 ranuncularum Lev. S. Ficariae Desm. S. polaris Karst., 

 S. Ranunculi Westv. S. ficarioides Peck, in the small size 

 of spores and character of leaf spots. Xot to be con- 

 fused with Ascochyta infuscans E. and E. on Ranun- 

 culus ahortivus which has thicker and somewhat shorter 

 spores. It approaches S. polaris more closely than any 

 other species described on Kununculaceous posts. 



On lower leaves of RainoicuJus sepfenfrionalis Poir, 

 near Urbana, Illinois, (Brownfield woods) April 21, 1921. 



