148 Journal of the Mitchell Society [February 



layer composed rarely of basidia alone, or more rarely of a thin felted 

 layer of interwoven hyphae which bears basidia and conidiospores. 

 Basidia clavate, simple. Spores white, smooth, simple or septate. 



The galls and other abnormalities produced vary so much, depend- 

 ing on what host or what part of the host is attacked, that many so- 

 called species names have been published depending on the kinds of 

 galls formed. Burt, who has studied the subject thoroughly, has 

 concluded that almost all of these belong to one species, E. Vaccinii 

 (Ann. Mo. Bot. Gard. 2: 627. 1915). He recognizes only two other 

 species or varieties, one E. Vaccinii uliginosi Boud., the other E. 

 Syniploci Ell. & Martin. The latter is parasitic on Symplocos tinc- 

 toria, but in it the basidia and basidiospores have not been found. 

 For an excellent article on the morphology of this group see Woronin, 

 Naturforsch, Ges. Freiburg, Verhandl. 4: 397. 1867. 



Exobasidium Vaccinii (Fuck el) Woronin. 



Plate 14 



Characters of the genus: Basidia four-spored; basiospores 2.5-5 

 X 10-20[Ji.. (Burt). Occurring on many genera and species of the 

 Heath Family. 



The most conspicuous and best known gall caused bj' E. Vaccinii 

 in North Carolina is the one called honeysuckle apples, which are 

 large, hollow, pale, sweetish, juicy formations often an inch or more 

 thick that many children know and eat. They are found on Azalea 

 nudiflora and A. atlantica and seem most abundant in the Coastal 

 Plain. Another remarkable hypertrophy occurs on Andromeda 

 Mariana, causing the flowers which are normally white and waxy 

 subcylindrical bells, to become changed into larger, greenish, more 

 open flowers with the petals more or less separated or quite free and 

 spreading. This is shown in our illustration, together with the nor- 

 mal flowers. This is the form that has been named E. Peckii. 

 11a. On Andromeda Mariana near east gate of campus. May 6, 1909. Photo. 



CYPHELLA 



Very small, cup-shaped or beaker-shaped or saucer-shaped, at- 

 tached by the center with a short stalk usually, and often hanging 

 downward, the lower, concave surface covered by the hymenium; 

 texture submembranaceous; basidia simple. The species grow on 



