208 The North American Cup-Fungi 



10. Paxina Corium (Weberb.) Seaver, comb. nov. 



Peziza Corium Weberb. Pilze Norddeutsch. pi. 3,f. 7. 1873. 

 Aleuria Corium Gill. Champ. Fr. Disconi. 39. 1879. 

 Lachnea Corium Phill. Brit. Discom. 204. 1887. 

 Macropodia Corium Sacc. Syll. Fung. 8: 159. 1889. 

 Fuckelina Corium Kuntze, Rev. Gen. PI. 2: 852. 1891. 

 Sarcoscypha Corium SchnJt. Krypt.-Fl. Schles. 3^: 59. 1893. 

 Elvela nigra Peck, Bull. Torrey Club 26: 70. 1899. 

 Cyathipodia Corium Boud. Hist. Class. Discom. Eu. 39. 1907. 

 Leptopodia Corium Boud. Ic. Myc. 6: 1, 6. 1909. 



Apothecia rather shallow cup-shaped or infundibuliform, with 

 the margin more or less wavy, reaching a diameter of 3-5 cm. 

 and a depth of 1-2 cm., externally blackish, with a brownish 

 tomentum, the substance tough, becoming very hard when dry 

 (white when broken) ; hymenium black or blackish ; stem 2-3 cm. 

 long and nearly 1 cm. in diameter at the base, tapering upward 

 to a diameter of 3-4 mm. near the base of the apothecium then 

 gradually expanding into the apothecium, irregularly and rather 

 sparingly lacunose, tomentose; tomentum consisting of hairs 

 which are composed of a chain of rather loosely united cells, 

 often branched, pale-brown; asci cylindric above, reaching a 

 diameter of 20 yu; spores 1-seriate, ellipsoid, smooth, usually 

 containing one large oil-drop w^hich nearly fills the spore, 10-12 

 X 18-20 /x; paraphyses strongly enlarged above where they 

 reach a diameter of 7-9 yu, pale-brown. 



On the ground. 



Type locality : Europe. 



Distribution: Nebraska to Colorado and Idaho; also in 

 Europe. 



Illustrations: Weberb. Pilze Norddeutsch. pi. 3, f. 7; 

 Cooke, Mycographia pi. 48, f. 187; Boud. Ic. Myc. pi. 239 bis. 



ExsiccATi: Fungi Columb. 2329; Clements, Crypt. Form. 

 Colo. 536. 



11. Paxina nigrella Seaver, sp. nov. 



Apothecia scattered, shallow cup-shaped, with the margin 

 more or less wavy, externally brownish-black, clothed with in- 

 conspicuous hairs, reaching a diameter of 2-3 cm. and a depth 

 of about 1 cm. or less, becoming strongly wrinkled when dry 

 (externally closely resembling Pseudoplectania vogesiaca) ; hy- 

 menium concave, black; stem reaching a length of 3-4 cm. and 

 a diameter of 2-3 mm. of nearly uniform thickness throughout 



