CENANGIUM. 345 
Name—xevée, empty, ayyos, a vessel ; from the hollow 
receptacle. 
ARRANGEMENT OF THE SPECIES. 
a. Sporidia elliptic. 
(a) Sporidia septate .. os -. species 1 
(6) Sporidia simple aes or oa 9 (24 
B. Sporidia oblong ie Ok 
c. Sporidia linear-fusiform or filiform aes » 6,7 
vp, Sporidia clavate .. os ae ee » 89 
Key To THE SPECIES. 
Externally glabrous .. bee na war ek 
Externally more or less powdery is 2 
Hymenium black, margined, substipitate : ‘on birch seriatum. 
Hymenium nearly black, scarcely margined, sub- 
1 stipitate “se + prunastri. 
‘1 Hymenium blackish-brown, margined, sessile .. subsuitidum. 
Hymenium pale cinereous; satel fimbriate, con- 
nivent, turbinate .. Ribis. 
Hymenium whitish cinereous ; margin lacetated . fuliginosum. 
2 Hymenium yellowish. . a . 38 
‘)Hymenium brown... 28 oe = .. pheosporum. 
Hymenium black an ae ». Rubi. 
3. Externally rugose, powder reddish . cs .. ferruginosum. 
Externally even, powder whitish .. ae .» pulveraceum. 
A. SPORIDIA ELLIPTIC. 
(a) Sporidia, septate. 
1. Cenangiwm prunastri. Fries. 
Cespitose, erumpent, substipitate or subcylindrical, 
united at the base into a common stroma, horny, smooth, 
blackish ; hymenium plane or slightly concave, nearly 
black, submarginate ; brown within ; asci clavate; sporidia 
8, oblong-elliptic, 1-septate, 10O—13 x 3—4u; paraphyses 
filiform, adherent, brown at the summits. 
Pyenidia associated on the same stroma with the 
above, awl-shaped, blackish, smooth, pierced for half their 
length with a cylindrical cell, opening at the summit ; 
stylospores fusiform, acute, curved, uniseptate, 15 x 2u. 
(Plate X. fig. 66). 
Cenangium prumastri—Fries, “Sys. Myco.,” ii. p. 180 ; 
“Eng. Flo.,” v. p. 211; Berk., “ OutL,” p. S74; Yoke 
« Handbk.,” No. 2190. Peziza prunastri—Grev., “ Flo. 
