HYMEXOSCYPHA. 121 



gated, rather thick, flexuous; asci cylindrical; sporidia 

 8, ovate, or sub-elliptic, or subglobose, 10 X 6^u; para- 

 physes filiform. 



Peziza caucus — Rebent, "Neom," p. 3S6, t. 4, f. 17; 

 Pers., "Myco. Eur.," p. 283; Fries, " Sys. Myco," ii. 

 p. 126 ; Cooke, " Handbk.," 201)3 (in part) ; " Grevillea," vi. 

 p. 23; Pat., p. 210, f. 483. Pez. amentalis — Schum., 

 "Saell," p. 418. Ciboria caucus — Fckl., "Symb. Myco.," 

 p. 311. Pkialea caucus — Gill., "Champ.," 110. 



On dead catkins of poplar, lying in damp spots. 

 Spring. 



Cup 1 to 2 J lines broad; stem as long or twice as 

 long as the width of cup, same colour as cup. 



The figure of Rebentisch, t. iv. f. 17, represents an 

 exceptional form of the plant, with a very slender stem, 

 described as "stipes filiform, slender, not dilated up- 

 wards " (Fries, I. c.) ; but our specimens have a moderately 

 thick stem, enlarged at the point of junction with the 

 cup : but Fries had only seen the figure. 



Name — Caucus, a drinking-vessel. 



Near Perth, N.B. ! (Dr. Buchanan White). 



(b) On tivigs. 

 11. Hymenoscypha luteo-virescens. (Rob.) 



Cup patelliform, then convex, firm, pallid-green, 

 margin entire ; stem slender, attenuated below, flexuose, 

 more or less elongated and immersed in the earth ; asci 

 cylindraceo-clavate ; sporidia 8, elliptical, 15 X 5/ul; para- 

 physes filiform, stout, filled with granules. 



Peziza luteo-virescens — Rob. in Desm., "Crypt. Fr," 

 ed. i. No. 1541; ed. ii. No. 1041; "Ann. Sc. Nat.," 1847, 

 viii. p. 188. Peziza pallido-virescens — Phil, in "Gre- 

 villea," vi. p. 24; "Scott. Nat.," vi. 163. Phialea luteo- 

 virescens — Gill., "Champ.," p. 108. 



Exs.— Desm., "Crypt. Fr.," I. c; Phil., "Elv. Brit," 

 No. 122. 



On buried petioles of Acer. Autumn. 



Cup 1 to 5^ lines broad ; stem often 10 lines long. 



