310 MINNESOTA BOTANICAL STUDIES. 



HELVELLACE^E. 



thank Mr. C. J. Hibbard who kindly assisted by making the 

 photographs. 



1. Helvella lacunosa AFZEL, Act. Holm. 304. 1783. (Plate 

 II., Jigs. n, 12, 13; Plate IV., figs. 11-16.) 



Solitary or gregarious ; stipe lacunose, fistulose, slender, 

 grayish to mouse-colored, up to 3.25 in. high, 1.25 in. wide; 

 pileus saddle-shaped or three lobed, slightly wrinkled, mouse- 

 colored, up to 2 in. in diameter; spores elliptical, obtuse, 

 smooth, containing one large oil drop, 16-18 mic. long, 9-12 

 mic. wide ; paraphyses filiform, branched, clavate, about 6 mic. 

 wide at the tip. 



On ground in moist, soft woods. 



Ramsey, Sept. 1898, Freeman 229 ; Cass, Sept. 1898, Free- 

 man, 186 ; * Hennepin, Oct. 1900, Butters 63; Hennepin, 

 Sept. 1900, Freeman 760; Hennepin, Oct. 1900, Hibbard. 



According to Phillips : " Differs from H. crispa, for a variety 

 of which it may easily be taken, by the more regular pileus, 

 2-4~lobed, scarcely laciniate, lobes later becoming free, and 

 especially by the colour. The stature generally smaller. Acute 

 characters are wanting in nature, therefore it is constant." The 

 stipe is more slender than that of H. crispa. 



The specimens agree with Thuemen Mycoth. Univ. 809, 

 spores of which are up to 16 x 12 mic. ; Sydow Mycoth. 

 March, 182, spores of which are 16-18 mic. x 8 10 mic. ; 

 Sydow Mycoth. March 2845, spores are 14-16 mic. x 8-10 

 mic. 



Krombholz Schwamme III., pi. 19, Jigs. 1821 (lacunosa), 

 Jigs. 22-26 (sulcatd)-, -pi. 21, jigs. 22-24.. I 834- 



2. Helvella crispa (Scop.) FR. Syst. Myc. 2: 14. 1822. 

 (Plate II., fig. 10.) 



Generally solitary ; stipe lacunated, fistulose, slightly bulbous 

 at the base, stout, grayish, measures up to 4 in. high and 2 in. 

 wide ; pileus very much lobed and folded or wrinkled, white, 

 up to 2.5 in. across; spores elliptical, obtuse, smooth, contain- 

 ing one very large oil drop, 10-16 mic. long by 8-10 mic. 

 wide; paraphyses filiform, clavate, septate, branched, about 4 

 mic. wide at the tip. 



On ground in hard woods, chiefly oak. 



