Parasitic Finif^i of Illinois. 177 



loose, transparent, vesicular (?) epidermis, often enclosing and border- 

 ing the opaque nucleus. — Curtis. Am. Jour. Sci. & Arts, 2 Ser., Vol. VI. 

 p. 35.i. 



On leaves of AniorpJia frufirosa: Adams, July 11. 5503. 

 II.: McLean. Jnly 29. 2289. II., III.. Oct. 18. 1859; Piatt. Aug. 

 15, 1076, Aug. 16, 1080, TL. III.. Aug. 17, 1133; Lee, Sept. 9. 

 5765. II., III., 5766: LaSalle, Sept. 12, 1476, II., III., Sept. 13. 

 1515. Sept. 14. 1535; Ogle. Sept. 25, 6162: Fulton, Oct. 1, 1772. 

 A. canescens: McHenry. Aug. 24, 1264, Aug. 25, 1290. Aug, 27, 

 1332, II., III.; Lake, Aug. 27, 1345: Lee, Sept. 11, 5785: Ste- 

 phenson. Sept. 14, 5891: JoDaviess, Sept. 15. 5915: Ogle, Sept. 

 22. 6097. 



This is Vropyxis a)norph((\ Schroter: but aside from the 

 peculiar coating of the teleutospore there is nothing to separate 

 the species from Puccinia. The uredoform would have been 

 considered a good Lecythia. and is much like that of Melai)ip- 

 sora on willows. The teleutosori on the upper side of the leaf 

 are compact., the spores crowded together. On the under side 

 the spores are diffusely associated in the sori. 



P. pruni-spinosae, Pers. 



II., III. Hypophyllous. Spots above small, scattered or 

 confluent, II. yellow. III. purple; sori scattered, small, rounded, 

 teleutosori purplish brown: uredospores oblong or clavate- 

 elliptical. smooth, 15-18 by 32-39 ,tt: paraphyses pedicel-lilce, 

 then swollen at the end and often curved: teleutos[)ores 

 deeply constricted, the segments often globose, easily separable 

 or more closely united aud irregular, strongly echinulate, 21-24 

 by 24-39 ^: pedicels hyaline, very fragile, about the length of 

 the spore: the paraphyses numerous, much enlarged above, 

 and brown. 



Scattered, minute, punctiform, spores globose, twin; pedicels very 

 short.— Pers. Syn. Fung. p. 226. 



On leaves of Primus Americana: Lake, Aug. 29, 1361: 

 McHenry, Aug. 31, 1387; Lee, Sept. 9, 5759; LaSalle, Sept. 13, 

 1502: JoDaviess, Sept. 16, 5954, Sept. 18, 5988, Sept. 19, 5994; 

 Ogle. Sept. 25, 6171. P. Vir(/inia)ia : McLean, Aug. <). 2290. 

 P. serotina: Ogle. Sept. 22. 1)112, U., IIL, Sept. 26, 6191, II., 

 IIL 



