136 



UNCONNECTED FORMS. 



150. Aecidium Boehmeriae Arth. Bull. Torrey Club 34:590. 1907. 



On Urticaceae: 



Boehmeria cylindricu (L.) Willd., Shades, Montgomery County, May 

 26, 1899, J. C. Arthur. 



An unconnected Aecidium the relationship of which is uncertain. 

 It has been collected otherwise only in Tacoma Park, District of Co- 

 lumbia. 



151. Aecidium Dicentrae Trel. Trans. Wis. Acad. Sci. 6:136. Nov. 



1884. 

 On Fumariaceae: 

 Bicuculla CucuUaria (L.) Millsp., Crawfordsville, Montgomery 

 County, -June 1893, E. W. Olive. 



No clue to the relationship of this interesting aecidium is available. 



152. Aecidium Tithymali Arth. Bull. Torrey Club 45:151. 1918. 

 On Euphorbiaceae: 



Tithymalus commutatus (Engelm.) Kl. & Garcke, Lafayette, Tippe- 

 canoe County, June 7, 1901, H. B. Dorner, 1905, G. W. Wilson, May 13, 

 1910, F. D. Kern and T. Billings, April 27, 1917, E. J. Petry; Craw- 

 fordsville, Montgomery County, May 17, 1913, F. D. Kern. 



While many attempts have been made to culture this presumably 

 heteroecious form, no success has been met with and its relationship 

 is still in doubt. It has formerly been commonly reported as A. Euphor- 

 biae Pers., now interpreted as a European species not occurring in 

 America. 



153. Aecidium Hydnoideum B. & C. Grevillea 3:61. 1874. 

 On Thymeliaceae: 



Direct palustris L., Crawfordsville, Montgomery County, 1893, E. W. 

 Olive; Everton, Fayette County, June 24, 1913, May 14, 1915, C. A. 

 Ludwig (Barth. N. A. Ured. 901; Fungi Columb. 4501) ; West Lafayette, 

 Tippecanoe County, June 5, 1911, G. N. Hoffer; Urmeyville, John.son 

 County, 1890, E. M. Fisher 929. 



A very distinct and quite common heteroecious form which has not 

 been successfully connected, though many attempts at culture have 

 been made. 



