227 



these species of pine, according to Sudworth, 35 has a range extending far- 

 ther north than the southern border of Tennessee. This distribution is 

 well outside the ISO mile limit established earlier in this paper. Two other 

 species of pine, P. echinata and P. virginiana, have a distribution which 

 might possibly meet the requirements, but there seems to be no evidence 

 other than their distribution that they carry the recia of this rust. Since 

 Gronton monanthogynus is an annual, the evidence seems to favor the idea 

 that the urediniospores are able to survive the winter. 



Two species of Pwcciniastrum occur in Indiana, P. Agrimonia:, on 

 Agrimonia, and P. Hydrangea, on Hydrangea. The former has been taken 

 in five counties in the State at various times since 1896, and usually the 

 infection is severe. P. Hydrangea has been taken three times in Tippe- 

 canoe county only. No secia are known as yet for either of these species, 

 but the aecia of the different species of Pucciniastrum, so far as known, are 

 species of Peridermium on leaves of Abies and Tsuga. Judging by the dis- 

 tribution for these trees given by the manuals, Indiana is probably just 

 outside of a 180-mile zone south of their distribuion. These trees are 

 often planted for ornament, however, and the possibility exists that the 

 agcia are to be found in the State. The rust occurs, however, as far south 

 and west as the state of Mexico in the country of Mexico, and it is not to be 

 expected that a species can travel so far in a season. 



Among the Coleosporiacea;, there are at least four species which have 

 been collected in the State under conditions which lend color to the idea 

 that they were carried over the winter in the uredinial generation. The 

 rusts of the genus, Goleosporium, have their uredinia and telia on various 

 broad leaved plants. Their a?cia are leaf inhabiting species of Peridermi- 

 um on pines. Goleosporium Terebinthinacew was collected in the autumn 

 of 1912 and 1914 on Silphium terebinthinaceum in a restricted area near- 

 Lafayette. In the latter season, the species was limited to a patch a 

 few rods in extent ; other Silphium plants in the same patch were unaf- 

 fected ; and no affected Silphium plants could be found across a small 

 ravine, altbough unaffected ones occurred in abundance. Other plants a 

 mile or so away in two directions were examined but were found unin- 

 fected. The aecial stage of this rust is not known, and so it is impossible to 

 say positively how near to this locality the aecia may approach. The near- 

 est collection of Peridermium on pine leaves to be found in the Arthur her- 

 barium is an undetermined collection on Pinus virginiana from Mammoth 



"Forest Atlas. Geographic distribution of North American Pines. Part 1, Maps 25 and 35. 1913. 



