helvelLa. 459 



hyaline, contiuuous, elliptical, ends obtuse, 17-18 X 9-10 /j.; 

 paraphyses hyaline, septate, slender, slightly clavate, a trifle 

 longer than the asci. 



On the ground. Autumn. Edible. 



Specimen in Phil., Elv. Brit., n. 102, examined. 



Distinguished from all other species by the stout, costate, 

 laounose, hollow stem ; entirely glabrous, fragile, and with a 

 semi-transparent look. Colour variable, included under the 

 following forms : — 



Eorma alba. Pileus whitish. 



Eorma Grevillei. Under surface of the pileus reddish ; 

 stem white. 

 ' Forma incarnata. Pileus and stem flesh-colour. 



Forma fulva. Pileus j'ellowish or tawny. 



Helvella lacunosa. Afzel., Vet. Ac. Hd., 1873, p. 30,5 ; 

 Phil., Brit. Di.-<o., p. 11; Sacc, SylL, viii. ii. 46. 



Ascophore irregular, often irregularly inflated, dark grey 

 or blackish-grey, irregularly lobed, lolies drooping and at- 

 tached to the stem by the under .-urface, 1^-5 cm. high ; 

 exoipulum composed of densely interwoven hyphae, which 

 inn out at the periphery into parallel, clavate, septate 

 hyphae, 10-20 /* thick at the tip; stem, 1-5-5 cm. long, 

 g-lj cm. thick, variously ribbed or lacunose, pallid ; asoi 

 cylindrical, 8-spored ; spores obliquely 1-seriate, broadly 

 elliptical, ends obtuse, smooth, hyaline, continuous, with 1 

 very large globose oil-uiobule, 18-20x10-12 fj. ; paraphyses 

 septate, becoming gradually clavate up to the brownish tip, 

 which is 6-10 /x, thick. 



Helvella sulcata, Afz., Vet. Ac. Handl., 1873. p. 306; Phil., 

 Brit. Disc, p. 12 ; Sacc, SylL, n. 48. 



On the ground in woods. Spring and autumn. 



Solitary or gregarious; very variable in size, as also in 

 the inflation ot the ascophore and the ribbing of the stem, 

 but an examination of numerous specimens in various ex- 

 siccati under both names given above proves that all are 

 forms of one variable species, and all agree in the above 

 characters. ; 



Helvella infula. SchaefF., Fung. Bavar, et Palat., 

 ph 159 ; Cooke, Mycogr., flg. 334 ; Phil., Brit. Disc, p. 13 ; 

 Gillet, Disc. Fr., p. 11 ; Sacc, SylL, viii. n. 57. , : 



