110 A.Barclay — A Descriptive List of the Uredinese [No. 2, 



N. B. — Since the publication of Part II of this List I have been 

 able to follow the complete life history of the Puccinia there described 

 under the name P. helvetica, Schroter, and there is no doubt that it is a 

 new species. Aecidial fructification is entirely suppressed. I Lave 

 given a full description of it under the name Puccinia Collettiana in the 

 Scientific Memoirs by Medical Officers of the Army of India, Part V, 

 1889. 



DESCRIPTION OF THE PLATES. 

 Plate III. 



Fig. 1. Uronnjces Vossiae, uredospore. 2, ditto, teleutospore. 3. Phragmi- 

 dium subcorticium, teleutospore, x 220. 3. a, ditto, aecidiospore. 4 Phragmidium 

 Rubi, teleutospore. 5. ditto, germinating, with sporidial formation. 6. ditto, 

 uredospores. 7 Melampsora Salicis Capreae, transverse section through teleutospore 

 bed, x 220. 8. ditto, through uredo bed, x 220. 9. Puccinia Fagopyri, teleutos- 

 pore, and germinating uredospore. 10. Puccinia nitida, three teleutospores and 

 uredospore. 11. Puccinia argentata, two teleutospores and uredospore. 



Plate IV. 



Fig. 1. Melampsora. Sancti-Johannis, transverse section through teleutospore bed, 

 x 150. 2. ditto, transverse section though leaf bearing uredo bed and spermogonia, 

 x 220. 3. ditto, natural ajjpearance of wholly involved very young shoot. 4, 

 ditto, surface view of teleutospore bed. 5. Melampsora Leptodermis, transverse sec- 

 tion though young teleutospore bed, x 220. 6. ditto, though uredo bed, x 220. 

 7. Puccinia Leptodermis. 



Plate V. 



Fig. 1. Aecidium complanatum, natural appearance. 2. Aec. brevius, natural 

 appearance. 3. A. complanatum, transverse section though peridium. 4. ditto, pe- 

 ridial cells seen flat. 5. ditto, lowermost cells of row of aecidiospores, showing inter- 

 calary lamellae. 6. A . brevius, peridial cells seen flat. 7. ditto, transverse section 

 though peridium. 8. A. complanatum, aecidiospores. 9. Aec. brevius, aecidiospores. 



Plate VI. 



Fig. 1. Chrgsomyxa Piceae, transverse section though fruit body, x 150. 2. 

 Goleosporium Gampanulae, transverse section though teleutospore bed, x 220. 3. 

 Goleosporium Glematidis, transverse section through teleutospore bed on leaf of G. 

 inontana, x 220. 4. Coleoporium Plectranthi, transverse section through teleutos- 

 pore bed, x 220. 5. Col. Glematidis, promycelium with sporidial formation (0. 

 inontana). 6. Caeoma Mori, sterile and fertile aecidospores. 7. Puccinia Iridis, 

 germinating uredospore. 8. Uredo Gomphrenatis, uredospore. 9, Uredo cronar- 

 tiiformis, uredospore. 10. Goleosporium Gampaimilae, uredospore. 



N. B. — Unless otherwise specified all figures are x 350. 



