ELVELLACEI. 



655 



Order. XXVIII, ELVELLACEI 



Hymenium at length more or less exposed ; substance soft. 

 — Berk. Outl.p. 358. 



Receptacle pileate or clavate — 



Hymenium folded and pitted . 



Hymenium even 



Hymenium rugulose .... 



Hymenium smooth, viscid 

 Eeceptacle clavate, confluent with stem . 

 Receptacle inflated — 



Hymenium ribbed 



Receptacle capitate — 



Head distinct, inflated .... 



Head compressed, running down the stem 



Head orbicular, hymenium velvety 

 Receptacle crustaceous, effused, with root-like fibrils 

 Receptacle cup-shaped — 



Disc soon open , . . . . 



Disc always open 



Receptacle indeterminate 



Receptacle patelljeform, mirgined — 



Asci fixed, 



Asci exploded 



Receptacle cyathiform, homy 



Receptacle closed, then open, coriaceous . 

 Receptacle orbicular, then truncate 

 Receptacle spha?rica], waxy .... 



Receptacle deciduous — 



Disc waxy, persistent .... 

 Receptacle obsolete— 



Hymenium immersed in matrix 



Hymenium a pulverulent stratum . 



Morchella. 



Helcella. 



Verpa. 



Leotm. 



Geoglossum. 



Gyromitra. 



Mitrida,. 

 Spathidojiria. 

 Vihrissea. 

 Rhizina. 



Pezizo.. 



Helotium. 



Psilopezia. 



Patellarm. 



Ascoholiis. 



Tymparus. 



Cenangium, 



Bulgaria. 



Agyrium. 



Laqitearia. 



Stictis, 

 Ascomyces. 



Gen. 286. 



Fig. 321 



SaORCHELLA, Dill. 



Receptacle clavate or pileate, 

 impervious in the centre, stipi- 

 tate, covered with the hymenium, 

 ■which is deeply folded and pitted. 

 — Fr. S.M. ii.p. 5. Berk. Outl.p. 

 358. {Fig. 321.) 



1938. Morchella esculenta. 



Pers. " Common Morel." 



Pileus ovate, adnate at the 

 base; ribs firm, anastomosing, 

 and forming deep pits : stem even ; 

 asci very long, sporidia oblong- 



