I06 MINNESOTA BOTANICAL STUDIES. 



mm. across ; stipe to i mm. long ; spores subf usiform to oblong, 

 hyaline, smooth, tending to become 2 or 4 septate, 6-8 x 1.5-2 mic. ; 

 paiaphyses filiform, slender. 



On rotten log; Wright, May 1900, hVeeman 641. 



4. Helotium nudum (Phill.) Mass. Brit. Fung-Flor. 4: 498. 1895. 

 Fccica niida IMiill. Scott. Nat. 6: 124. 1871-1880. 



Hcloiiiim phillipsii Sacc. Syll. Fung. 8: 220. 1889. 



Gregarious, stipitate ; hymenium pale-buttery yellow with white 

 rim, first convex becoming plane, to 4 mm. in diameter ; exterior 

 and stipe white, glabrous to minutely pubescent; stipe slender, 

 tapering, 6-7 mm. long; spores fusiform, acute, smooth, hyaline, 

 with 2-4 guttulae, finally 1-3 septate, 6-9x2-3 mic; paraphyses 

 long-pointed, longer than ascus, granulated, slender. 



On old wood and bark on ground in swamp ; Washington, June 

 1904, Lyon 848. 



Massee gives the size as i mm. broad by 2 lines high (134, p. 

 498) while the Minnesota specimens are about double that size; 

 o.therwise they agree. 



5. Helotium virgultorum var. fructigenum (Bull.) Rehm, Flora p: 160. 



1869, 



Pecica fnictigcna Bull. Hist. Champ. Franc. 236. 1791-1798. 



Gregarious, stipitate. subglobose to convex or plane, tough ; mar- 

 gin entire; hymenium yellow to rufous, 2 mm. in diameter; exterior 

 of cup same color, glabrous ; stipe 4 mm. long, 0.5 mm. thick, cylin- 

 drical, pale; spores elliptical, slender, acute, curved, tendency 

 towards septa, hyaline, smooth. 14x3 mic. seem immature; para- 

 physes filiform, colorless. 



On decaying acorns; Hennepin. Sept. 1889. MacMillan 160; 

 Washington. Sept. 1907, Hone 838. 



Exsiccati: Rabh. Fungi Europ. 121; Krieger, Fungi Sax. 189; 

 Thumen, Fungi Austr. 929. Sydow, Mycoth. March. 74 ; Plates : 

 Sow. Eng. Fung. i. p\. 117; Gill. Discom. Franc, pi. "/t,. fig. 3. 



6. Helotium scutula (Pers.) Karst. Myc. Fenn. i: no. 1871. 

 Pc-Jza scutula Pers. Myc. Europ. i : 284. 1822. 



Gregarious or crowded, stipitate, cupulate to nearly plane, firm, 

 to 2 mm. in diameter ; hymenium ochraceous ; stipe slender, white, 

 to 3 mm. long; spores spindle-like, acute, hyaline, smooth, with 

 2-4 guttulae. ultimately septate. 10-20 x 2-3 mic. ; paraphyses fili- 

 form, slender, hyaline. 



On dead and fallen herbaceous stems, as Hcliantlius. Rudhcckia, 



