1921] 
BURT—TREMELLACEAE, DACRYOMYCETACEAE, AURICULARIACEAE 371 
Exidia nucleata (Schw.) Burt, n. comb. 
Tremella mnucleata Schweinitz, Naturforsch. Ges. Leipzig 
Schrift. 1: 115. 1822.—Naematelia nucleata (Schw.) Fries, 
Epier. 592. 1838; Hym. Eur. 696. 1874; Berkeley, Outl. 
Brit. Fung. 290. 1860; Peck, N. Y. State Mus. Rept. 24: 83. 
1872; Berkeley & Curtis, Grevillea 2: 20. 1873; Morgan, Cin- 
cinnati Soc. Nat. Hist. Jour. 11: 93. 1888; Sacc. Syll. Fung. 
6: 793. 1888; Coker, Elisha Mitchell Scientif. Soc. Jour. 35: 
136. pl. 23. f.3; pl. 41. f. 1; pl. 56. f. 3-5. 1920.—An Exidia 
gemmata (Lév.)? 
Illustrations: Coker, loc. cit. 
Type: in Herb. Schweinitz. 
Fructification effused, plane, somewhat gyrose and undulate, 
white at first, shrinking to a membrane in drying and becoming 
tawny olive to mummy-brown and containing a few scattered, 
conspicuous, white, subglobose concretions of calcium oxalate 
about 1/5-1/3 mm. in diameter; basidia 8-12 x 6-8 y; spores 
hyaline, even, curved, 8-9 x 3-4 y. 
Covering areas 5 mm.-3 em. in diameter, not thicker when 
dry than the imbedded concretions. 
On fallen limbs of frondose species. Maine to Louisiana and 
westward to California; occurs also in Europe. September to 
March. Widely distributed but not common. 
Exidia nucleata is noteworthy by fructifications so thin 
that they suggest a Sebacina but are gelatinous throughout 
and often elevated or pinched up in the center, by the tawny 
olive color assumed in drying, and by the more or less numerous, 
white, chalky, seed-shaped concretions. I know Exidia gem- 
mata of Europe only by the specimen received under this name 
from Bourdot; this specimen agrees in all respects with our Z. 
nucleata. 
Specimens examined: 
Exsiccati: Ellis, N. Am. Fungi, 520; Ravenel, Fungi Car. 4: 82. 
France: Allier, St. Priest, H. Bourdot, 12147. 
Maine: Orono, F. L. Harvey (in Mo. Bot. Gard. Herb., 1733, 
5353). 
Vermont: Middlebury, E. A. Burt. 
New Jersey: J. B. Ellis, in Ellis, N. Am. Fungi, 520. 
