230 IlJ/'iiois State Lahnratory of Natural Iliiitory. 



E. PhiladelpJiicum : Union, April 17, 4136; Champaign, June 

 8, 4916. E. annuum: Johnson, May 12, 4634, May 13, 4666; 

 Champaign, June 8, 4893, June 10, 4953; Adams, June 27, 

 5305, July 6, 5433. 



^. asterum, Schw. 



Hypophyllous. Spots usually distinct, somewhat swollen, 

 yellow or purple; a?cidia subcircinate or irregularly crowded, 

 short, deeply divided and recurved, soon becoming pulverulent; 

 spores subglobose, epispore thin, tuberculate, 12-17 f^; speruia- 

 gonia rather indistinct, few, mostly on upper side, yellow. 



On Aster sagittifoUu.^: Jackson, April 21, 4212, 4214, 

 April 25, 4282; Union, April 24, 4253, April 28,4382; Pulaski, 

 May 1, 4402, May 5. 4501, May 10, 4588; Johnson, May 11, 

 4613; McLean, May 20,4723. Aster sps.: Jackson, April 25, 

 4285; Pulaski, May 5, 4510; Johnson, May 12, 4646; McLean, 

 July 7, 2423, July 15, 5558. On Solidago latifolia: 4248, 4284, 

 4732, 4994. On S. ccBsia: 4249, 4485, 4574, 4506, 4614, 5556. 

 S. rigida: 4837 (only spermagonia). S. altissima: 4250, 

 4575, 4587, 4615, 4665, 4688, 4809, 5253. Solidago sps.: 4050, 

 4137, 4166, 4175, 4197, 4283, 4308. 4401, 4425, 4426, 4484, 4528, 

 4647, 4687, 4733. 



Schweinitz at first separated those on /So/w/a^/o under the 

 name ^E. soUdaginis^ but subsequently united them with the 

 Aster forms. His change in the form of the specific name to 

 asteratuiH is not followed. 



There seems to be a different .Ecid'nini on Solidago. See 

 Ellis' North American Fungi, No. 1018. 



M. compositarum. 



Under this head are united all the ^Eridia on Couiiiosita- 

 except the two foregoing, whose teleutoforms are doubtful. It 

 is iuipossible to satisfactorily determine them until full life 

 histories are worked out. It is even impossible to give in this 

 place a description of the species properly known as yEridinin 

 compositarum, Mart., neither is it deemed wise to try to refer 

 anything to the Schwemitzian species, ^E. helianthi-nioUis and 

 .E. tracheliifoliatuiH. Taking the host plants as guide to a 

 considerable extent, the following/f^r^ks' are noted: 



