Prelimhianj List of Wisconsin Parasitic Fungi. 115 



entiated into spores. A considerable number of specimens show that the 

 species winters very largelj^ by its perennial mycelium rather than by 

 ascospores, and new knots are usually formed close below the old ones by 

 the same mycelium. The " black knot " undoubtedly also occurs on culti- 

 vated species of Primus, though I have not yet collected it on them. 



63. Nectria cinxabarina (Tode). 



On branches of Robinia pseudacacia L. Ma.iison. 

 This with its conidia, Tubsrcularia vulgaris Todc, has been collected 

 only on dead branches; but it has been shown by Dr. Heinrich Mayr 

 (Part 3 of Hartig's Untersuchungen aus dem forstbatan. Institut zu Miln- 

 chen), tliat the species sometimes lives as a true j)arasite on maple, box- 

 elder, etc. 



63. Cryptosporella ancgiala (Pk.) (Diatrype anomala Peck). 



Forming knots on branches of Corylus americana'Walt. Madison. 



64. Epichloe typhina (Pers.). 



On sheaths of an Elymus, Andropogoii furcatus Muhl. and one 

 other undetermined grass. Madison, Stoughton, Ithaca; La Crosse, 

 Pammel. 



65. Claviceps purpurea (Fr.) ? 



Common on Secale cerecde L., and Triticum vulgare Vill. Syehe; 

 La Crosse, Pam mel. 

 The sclerotia were not subjected to cultures, and consequently no peri- 

 thecia were obtained, but there can be little doubt as to the species, 



66. Claviceps, sp. 



On Zizania aquatica L. Milwaukee, Lapham. 

 The sclerotia are stout, ovoid, oblong, averaging 5x9 mm. Their color is 

 pinkish, brown. I have seen the sams thi>ig in the herbarium of Dr. 

 Farlow, but do not know that it has ever been made to fruit. 



67. Claviceps, sp. 



Small sclerotia have been found in abundance on Elymus striatus 

 Willd., E. canadensis L., Koeleria cristata Pers., Glyceria nervata 

 Trin., Agrostis scabra Willd., Deyeuxia canadensis Beauv., Poa 

 compressa L. and Phleum pratcnse L., at Madison, Ithica, 

 La Crosse and Kilbourn City, by Mr. Pammel and myself. No 

 cultures having been undertaken, however, tlie species is unde- 

 termined. 



68. Cordyceps militaris (L.) {Torrubla militaris, Fr.)? 



Conidia on ''white grubs " in fall. Madison. 

 Only the Isaria sta^e was seen, although a number of cultures were 

 undertaken. 



