AGARICALES 



Tulasne. Observations sur 1' organization des Tremellinees. 

 Ann. Sc. Nat. III. 19 : 193-231. PL 10-13. l %53- 



Tulasne. Nouvelles notes sur les Fungi Tremellini et leurs 

 allies, Ann. Sc. Nat. V. 15: 215-235. 1872. 



Brefeld. Untersuchungen aus dem Gesammtgebiete der My- 

 kologie, 7; 138-167. PL 10, n. 1888. 



Order 6. EXOBASIDIALES. 



This order is composed of a single family, the Exobasidiaceae, 

 and contains parasitic species which produce deformities and galls 

 chiefly on members of the Ericaceae, that are superficially com- 

 parable to the deformities produced by species of Exoascus on 

 the plums. One of the common species produces large swollen 

 whitish or pinkish galls on Azalea which have a slightly acid 

 taste and are sometimes eaten under the name of May apples ; 

 others produce disk-like deformities on leaves of the same plant. 

 Others still are found on Cassandra, cranberrries and various spe- 

 cies of Vacciniuui and Gaylussacia, either deforming the leaves, 

 in which pockets are formed, or the flowers and young fruit, which 

 become enormously swollen and assume a pinkish white tint. 

 Certain cultures have been made that seem to indicate that sev- 

 eral of these various forms may be members of a single poly- 

 morphic species. 



Besides the genus Exobasidium with four-spored basmia, a 

 second genus, Microstronia, has recently been placed in this family, 

 distinguished by its mostly six-spored basidia. Two species are 

 known, one growing on oak leaves and the other common on Ju- 

 glans and Hicoria forming whitish patches on the under surface of 

 the leaves. 



LITERATURE. 



Hennings. Die natiirlichen Pflanzenfamilien, i 1 **: 103-105. 

 Saccardo. Sylloge Fungorum, 6 : 664-666 ; 9 : 244, 245 ; n : 



13, I 3 I - 



Richards." Notes on Cultures of Exobasidium andromedae 

 and of Exobasidium vacinii. Dot. Gaz. 21; 101-108. PL 6. 1896. 



Order 7. AGARICALES. 



This extensive order has been commonly known under the 

 name HYMENOMYCETES, the name arising from the fact thai the 



