[Vol. 2 

 636 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



resemble monstrous flowers — up to 5 cm. long in the dried 

 state — with all floral organs enlarged proportionally, as in 

 the flower galls of Andromeda Mariana, Gaylussacia resinosa, 

 and Vaccinium vitis-idaea. Only flower galls are as yet known 

 to me for Lyonia ferruginea, but as the morphological char- 

 acters of the fungus found on the galls are those of Exo- 

 basidium Vaccinii, I regard these galls as similar to those of 

 Andromeda Mariana but much larger and due to Exobasidium 

 Vaccina. The large size of these Lyonia galls is the expres- 

 sion of the growth response of the flower tissue of this host. 

 It will be interesting if further collections of this host show 

 that only the flowers are susceptible to infection by Exo- 

 basidium. 



Exobasidium Oxycocci was proposed as a name for the 

 fungus causing the shoot galls of wax-like or coralloid habit 

 which are produced by Oxycoccus palustris. Similar galls are 

 produced in the United States by Vaccinium macrocarpon 

 and V. intermedium. Shoot galls of V. macrocarpon are illus- 

 trated in color by Shear^ and also the leaf spot and leaf con- 

 cavity galls which this host produces. The morphological 

 characters of the fungus producing the shoot galls on the 

 cranberry species of Vaccinium are the same as those of 

 Exobasidium Vaccinii; the galls produced by cranberry 

 plants are such as E. Vaccinii produces. As there is no evi- 

 dence of any kind that E. Vaccinii, common throughout the 

 same region, does not cause the cranberry galls, the name E. 

 Oxycocci seems quite unnecessary. 



Exobasidium Cassiopes and E. Karstenii have been pub- 

 lished as causes of the shoot galls produced by Cassiope Mer- 

 tensiana and Andromeda polifolia respectively. These shoot 

 galls are of the wax-like or coralloid type such as Vaccinium 

 vitis-idaea produces under stimulation by Exobasidium Vac- 

 cinii. As the morphological characters of the so-called E. 

 Cassiopes and E. Karstenii are those of E. Vaccinii, and as 

 no evidence has ever been presented that E. Vaccinii does not 

 cause the galls referred to, E. Cassiopes and E. Karstenii 

 should also be regarded as synonyms of E. Vaccinii. 



^ loc. cit., pi. 8. 



