[Vor. 8 
366 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
bama along the northern range of Tremella fuciformis. E. alba 
was formerly confused with Æ. albida of Europe until Lloyd 
pointed out that the former is clearly distinct from any known 
white tremelline species of Europe by the presence of gloeocys- 
tidia in its hymenium. Lloyd included Æ. alba in the little- 
known Australian genus Seismosarca but I am reluctant to 
follow him in this respect, for since genera are merely rather 
natural groups of species of convenient size for taxonomie work, 
it seems unnecessary and a great pity to segregate already small 
genera on the basis of every positive character which would 
make a species noteworthy. E. candida is known so far from 
the state of Washington only. 
The details of the above species are as follows: 
Exidia alba (Lloyd) Burt, n. comb. 
Exidiopsis alba Lloyd, Myc. Writ. 4. Letter 44:8. 1913.— 
Seismosarca alba Lloyd, Myc. Writ. 5. Myc. Notes 45: 029. 
1917; Myc. Writ. 6. Myc. Notes 65: 1045. f. 1928, 1929. 1921. 
Fructifications large, cerebriform, subfoliaceous or with 
rounded convolutions, white or somewhat creamy, marginal 
portions discoloring in the herbarium to tawny olive and Sayal- 
brown and the more central regions approaching fuscous; gloeo- 
cystidia somewhat colored, cylindric, flexuous, up to 30 x6 y; 
basidia subglobose, 10x9 y; spores hyaline, curved, even, 
9-10 x4L5 u; edible. 
Fructifications 1-4 em. high, 2-10 em. in diameter. 
On dead wood. According to literature probably ranging 
from New York to Minnesota and southward to Alabama but 
known to me by specimens from Wisconsin to Alabama only. 
June to October. Frequent. 
Within the basin of the Mississippi E. alba is the common 
species occurring in large, white or slightly creamy masses on 
dead wood; reference of collections to this species may be con- 
firmed by presence of the conspicuous gloeocystidia when a bit 
of the hymenium is crushed in water under a cover glass. Dr. 
Glatfelter found this species so abundant in Forest Park, St. 
Louis, that he tested its edible properties, and he noted on the 
collection which was preserved that this species is ‘‘edible but 
not delicious." 
