352 



82. PucciNiA Polygon i-CoNVOLVULi Hedw. f., Poiiet. Encycl. Meth. Bot. 



8:251. 1808. 

 Pnccinia Polygoni A. & S. Consp. Fung. 132. 1805. (Not P. Poly- 

 goni Pers. 1794.) 



On Polygonaceae : 



Polygonum Convolvulus L., Lewes, Aug. 14, 1907, II, (1692). 



83. PucciNiA PUSTULATUM (Curtis) Arth. Jour. Myc. 10:18. 1904. 

 Aecidium pustulatum Curtis; Peck, Ann. Rep. N. Y. State Mus. 



23:60. 1873. 



On Poaceae: 



Schizachyrium scoparium (Michx.) Nash (Andropogon scopa- 

 rius Michx.), Seaford, Nov. 15, 1907, (1760). 



This species of Andropogon rust is difficult to separate from P. 

 Andropogonis Schw. In the latter, however, the uredospore markings 

 are finely verrucose-echinulate with the pores 3-4 scattered (rarely 

 appearing equatorial) while in the form here con.sidered the uredospore 

 markings are of the echinulate type and the poies 4-6 scattered. 



The life hi.story of this heteroecious rust was first determined by 

 Arthur in 1903 (Jour. Myc. 10:17. 1904). He sowed germinating telio- 

 spores from Andropogon fuvcatus and A. scopariiifi collected in Indiana 

 on Comandra umbellata and obtained the development of pycnia and 

 aecia of Aecidium pustulatum. These experiments were successfully 

 verified in 1905 and 1910 (Jour. Myc. 12:16. 1906; Mycol. 4:17. 1912) 

 using telial material on A. furcatus from Indiana and Colorado. 



84. PUCCINIA RECEDENS Syd. Monog. Ured. 1:146. 1902. 



On Carduaceae: 



Senecio aureus L., Naaman's Creek, July 28, 1893, A. Commons 

 (2129). 

 This species has previously been confused with P. Asteris Duby. 

 It is a micro-Puccinia common on Senecio aureus in the northeastern 

 United States. It is known on other hosts from the Atlantic to the 

 Pacific in the more northern states. 



85. PUCCINIA Rhamni (Pers.) Wettst. Verhl. Zool-Bot. Ges. Wein. 



35:545. 1885. 

 Aecidium Rhamni Pers. in Gmel. Syst. Nat. 2:1472. 1791. 

 Puccinia coronata Corda, Icones 1:6. 1837. 



