Seaver: Cup-Fungi 
237 
appears never to be elevated in young plants as it is in Pesisa 
clypeata Schw. Psilopesia nummiilaria has not been so fre- 
quently collected and probably for this reason its characters are 
not so well known. 
The following description of Pezisa clypeata Schw. is based on 
a study of fresh plants which have been collected and studied 
for the past three or four seasons. Colored sketches of the plants 
in all stages have also been preserved. The accompanying illus- 
trations were made from fresh plants and show both the old and 
young stages of development. 
Peziza clypeata Schw. Schr. Nat. Ges. Leipzig i ; 117. 1822 
Peziza adnata Berk. & Curt. Jour. Linn. Soc. 10: 365. 1868. 
Bulgaria bicolor Peck, Ann. Rep. N. Y. State Mus. 32 : 49. 1879. 
Peziza orbicularis Peck, Bull. N. Y. State Mus. 2 ; 20. 1887. 
Discina adnata Sacc. Syll. Fung. 8: 100. 1889. 
Discina clypeata Sacc. Syll. Fung. 8; loi. 1889. 
Discina orbicularis Sacc. Syll. Fung. 8: 103. 1889. 
IPeziza Barlaeana Bres. Fungi Trident. 2 : 74. 1892. 
Psilopezia jiiruensis P. Henn. Hedwigia 43; 273. 1904. 
IPachyella Barlaeana Bond. Hist. Class. Discom. Eu. 50. 1907. 
Psilopeziza orbicularis Dodge, Trans. Wise. Acad. Sci. 17: 1052. 
1913- 
Apothecia gregarious but not usually crowded, at first gfobose, 
gradually opening, soon becoming shallow cup-shaped, later dis- 
coid, regular in outline or occasionally more or less distorted when 
old, becoming closely adnate to the substratum to the extreme 
margin or with a narrow margin free and slightly upturned, vary- 
ing in size from a few mm. when young to 3 or 4 cm. when ma- 
ture ; hymenium at first dark reddish brown, smooth and glisten- 
ing, later assuming an olive tint and losing its luster, when old 
greenish-black (almost entirely black when dried), splitting in old 
specimens, giving rise to whitish vein-like markings, the splitting 
due to the unequal shrinkage of the apothecium and the sub- 
stratum, substance soft, inclined to waxy ; asci cylindric, reaching 
a diameter of ly fi, often spirally twisted when dry; spores 
I -seriate, ellipsoid, smooth, hyaline, with i or 2 large oil-drops, 
12-14X25-27, or rarely 30-33//.; paraphyses adhering together, 
septate, strongly enlarged above, reaching a diameter of 7 or 8//, 
densely filled with yellowish-brown coloring matter. 
On much decayed deciduous logs of various kinds which are 
saturated with water. 
