23 



order short or often much elongated, the others usually short and 

 compact, tips strongly recurved, very ornate. Asci 1-6 or more, vari- 

 able in shape and size. Sporidia 4-6. 



On Jfe/tisperutum Canadense. Not frequent. Xew York to 

 Iowa (Holway). 



Remarkable for the variation in structure and size. In some 

 perithecia only one ascus is found, while in others in the same micro- 

 scopical preparation at least seven have been seen. The appendages 

 on a single perithecium are somewhat equal in length but are often 

 oxceediiiirlv variable in the division of the til s. Sometimes there is 



1 _ 



only a single fork with two equal, straight, obtuse branches and 

 again the exceedingly ornamental tip fills the field of the microscope 

 with its complex scroll-work. 



M. Russellii, Clinton, 26th Rep. X. Y. State Mus. p. 80. 



Amphigenous. Mycelium inconspicuous. Perithecia small, 75- 

 100 //, delicate, reticulations regular, distinct, about 10 //; append- 

 ages 8-18, many times longer than the diameter of the perithecium. 

 colored for half or two thirds of their length, occasionally septate. 

 simple, bifid, or two or three times irregularly branched, branches 

 long, often distorted, tips not swollen or recurved. Asci 4-8. Spo- 

 ridia usuallv 4. small. 



t 



On O.w/7/.s rioldccu. and 0. Comiculata var. strirt't. Not uncom- 

 mon east .of the Mississippi ; not reported \\vst\viml. A well charac- 

 terized species. 



M. Raveiielii, Berk. Grev. IV. p. 160. 



Amphigenous. .Mycelium usually abundant, persistent. Perithe- 

 cia abundant, usually large, 100-130 //. reticulations small and irreg- 

 ular, about 10 //. ; appendages 10-20, somewhat roughened, usually 

 hyaline, occasionally* colored for a distance, the color ending: at an 



V */ 



abrupt line like a septum, once or twice as long as the diameter of the 

 perithecium, 5-7 times dichotomous, branches short, forming a more or 

 less compact head, tips usually acute and recurved. Asci 6-10. fre- 

 quently 8, ovate, pedicellate, about 45 x 60 p. Sporidia 46 (Saccardo 



says 8). 



On Astragalus adsurgens^ Lathy rus palustris, Gleditschia tria- 

 canthos, Vicia Americana, V. Americana var. linearis. 



Rather common and very widely distributed. It is reported 

 more often from the valley of the Mississippi and westward to Montana 

 and Texas. 



