orton: north American species of allodus 



207 



Telia chiefly hypophyllous, surrounding tlie secondary aecia 

 or scattered, sometimes confluent to form large sori, rupturing at 

 the apex to form a conspicuous ostiole; teliospores broadly ellip- 

 soid, 15-21 by 25-32^1; wall chestnut-brown about 1.5 m thick, 

 smooth, the apex sometimes thickened to 3 z^; pedicel colorless, 

 rarely as long as the spore. 



On Compositae: 



Senecio atriapiculatus Rydb., S. crassulus A. Gray, 6". dispar 



A. Nels., S. hydrophiliis Nutt., S. hydrophilus pacifictcs Greene, 



.S*. integerrimus Nutt., 6*. lugens Rich., S. taraxacoides (A. Gray) 



Greene, and S. triangularis Hook. 

 Type locality: Mt. Paddo, Washington, on Senecio triangularis. 



{Suksdorf, Aug. 1885.) 

 Distribution: Nebraska to California and British Columbia. 

 ExsiccATi: Ell. & Ev. N. Am. Fungi 1840; Ell. & Ev. Fungi 



Columb. 14SP; Sydow, Ured. 782, 1943; Garrett, Fungi Utah. 



2g, 106; Barth. Fungi Columb. 4468; Barth. N. Am. Fungi 



1371, 1372. 



Note. — This species is distinguished from Allodus Senecionis 

 (Lib.) Arth. by the slightly smaller aeciospores and the scarcely 

 thickened apex of the teliospores, without the hyaline umbo. 

 A. Senecionis is not known to occur in North America. 



Aecidlum 



Cerasti, 199 

 claytoniatum, 184 

 convolvulatum, 197 

 Galii ambiguum, 203 

 Giliae, 199 

 gnaphaliatum, 205 

 graminellum, 180 

 intermixtum, 204 

 Ipomoeae, 195 

 Ipomoeae-panduranae, 197 

 Leptotaeniae, 190 

 Ludwigiae, 189 

 monoicum, 188 

 Nesaeae, 189 

 Phlogis, 199 

 Podophylli, 186 

 podophyllatum, 187 

 Swertiae, 195 

 tenue, 205 

 Wilcoxianum, 199 



Allodus 



ambigua, 177, 203 

 areolata, 186 

 asperior, 193 



INDEX TO SPECIES 



Batesiana, 177, 204 

 Bouvardiae, 202 

 Calochorti, 181 

 Carnegiana, 182, 183 

 Chamaesarachae, 177, 201 

 claytoniata, 177, 184, 185 

 commutata, 203 

 consimilis, 177, 187 

 crassipes, 196 

 Desmanthodii, 206 

 Dichelostemmae, 183 

 Douglasii, 177, 198 

 effusa, 188 

 Erigeniae, 191 

 gigantispora, 185 

 Giliae, 177, 199 

 gnaphaliata, 205 

 graminella, 178, 180 

 imperspicua, 189 

 insignis, 197 

 intermixta, 177, 204 

 Jonesii, 190 

 lacerata, 194 

 Lindrothii, 192 

 Ludwigiae, 189 

 megalospora, 198 

 melanconioides, 194 



mellifera, 200 

 microica, 192 

 Moreniana, 182 

 Musenii, 193 

 Nesaeae, 189 

 nocticolor, 197 

 opposita, 185 

 opulenta, 195 

 oregonensis, 193 

 pagana, 181 

 Palmeri, 202 

 plumbaria, 199 

 Podot ny li, 178, 186 

 rufescens, 202 

 subangulata, 183 

 subcircinata, 206 

 superflua, 198 

 Senecionis, 207 

 Swertiae, 195 

 tenuis, 205 

 vertisepta, 200 



Caeoma 



claj'toniatum, 184 

 podophyllatum, 187 

 tenue, 205 



