EXPLANATION OF PLATES CXLII-CXLIII. 
Illustrating Dr. Malcolm Wilson’s paper on Puccinia Prostii, Moug. 
All the photographs refer to Puccinia Prostwi, Moug. 
PLATE CXLII,—Three leaves _ Tulipa sylvestris, L. attacked by the fungus. The 
leaves on the left show the upper surfaces, and the one 
on the roht the under surface. About # natural size. 
Piate CXLITI. 
Fic. 1.— Portion of a leaf attacked by the fungus. a, yellowish-brown areas 
in which spermogonia and young teleutospores are present. 
sorus surrounding SS teleutospores and spermogonia. Abou 
1} times natural s 
Fic. 2.—Transverse nai m ‘eat of Tuliba syluesivis showing spermogonia. 
about 2 
Fic. 3.—Transverse section of leaf of plea de sylvesivis showing amphigenous 
teleutospore sori. X abou 
Fic. 4.—Transverse section of leaf of Tulipa sylvestvis showing part of teleu- 
tospore sorus. X about I 
lates are taken from photographs by Mr M. Y. Orr and Mr R. M. Adam 
The pi 
f£ living nb aie and preserved material in the Royal Botanic Garden, 
Fadi inburgh. 
