[VOL. 2 



640 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



lections on Vaccinium vitis-idaea. As shown by Richards, 1 

 these hyphae bear simple, acicular, conidia about 6-9 X 1-1 i M- 

 Conidia are nearly always present in the preparations but 

 have been entered only occasionally in my table. The basidia 

 are generally 4-spored. The basidiospores from herbarium 

 specimens are colorless, simple or with some uniseptate, 

 10-20x21-5 (x, but are usually about 12-18x3-3$ p. They are 

 sometimes a little shorter, or a little longer, or a little thinner, 

 or a little thicker, but are so variable within the extremes 

 stated for different collections on the same host within the 

 same regions or distant regions — as will be seen by reference 

 to my table — that a moderate latitude in spore dimensions 



seems evident. 



2. E. Vaccinii uliginosi Boud. 



The European specimen of this species distributed from 

 Norway in Briosi and Cavara, 'Funghi Paras.,' 261, has a 

 resupinate, hypophyllous felty fructification, 30-45 p thick, 

 which is composed almost wholly of large basidia, standing 

 close together and presenting in sections the appearance of 

 a distinct palisade layer. This fructification begins below the 

 epidermis and tears the cells of the latter loose and apart 

 from each other and carries them outward between the 

 basidia. The hymenium is abundantly fruited with basidio- 

 spores, borne two to a basidium. The spores are simple, 

 colorless, even, curved towards the base, 18-20x6-7 //. No 

 conidial hyphae could be found between the basidia in this 



specimen. 



The specimen distributed in Eriksson, ' Fungi Par. Scand.,' 

 286a, has similar spores 16-20x8 //. This specimen is in 



poorer condition and does not show basidia clearly. In some 



places the fructification is composed of very fine, short-celled 

 hyphae, which are not bearing conidia. Both the above speci- 

 mens are shoot galls with leaves felty below and reddened 



above. 



Professor Piper, 443, collected on Vaccinium membran- 

 aceum, at Mt. Ranier, Washington, in August, a shoot gall 

 similar to the European specimens and having a well fruited 



1 loc. cit. 



