to a Knowledge of the Hvdnaceae 



203 



Synopsis of Species 



J.ijnatile ; small, 2 cm. wide ; dark green throughout. 



1. II. atro-viritfe 



Terrestrial. 



Substance of pileus fleshy, brittle. 



Bright colored, white, yellow, or orange. 



White ; spores small, less than 6 fi wide. 



Plant small, less than 3 cm. wide. 

 Plant larger, more than 5 cm. wide. 

 Buff or yellow ; spores more than 5 fi wide. 

 Teeth decurrent. 

 Plant solitary. 



3. H. albuhim. 



4. H. albo- magnum 



H. Wash 



Plants cespitose, flesh turning yellow when cut. 



Teeth not decurrent or but slightly so. 

 Pileus cracked and split. 



6. H. caespitosum* 

 2. H. repandum. 



7. H. diffr actum* 



Pileus smooth. 



ferrug 



Pinkish gray, stem scabrous. 

 Brownish. 



13. H. scabripcs 



Teeth not decurrent or but slightly so; pileus expanded, plane, 



smooth. 



Teeth decurrent. 



9. H. laevigatum. 



Pileus infundibuliform, stem slender. 



Pileus plane or convex. 



10. H. infundibulum . 

 29. H. fusipes. 



Pileus scaly or tomentose. 

 Plants solitary. 



Scales thick, regularly imbricate. 

 Scales thin, irregular, superficial. 

 Plants cespitose. 



H. 



Plants confluent, stem somewhat branched. 



30. H. 



Plants distinct, stem slender, flexuose. 



37. H. Fennicum. 



Substance of pileus tough, corky, woody, or coriaceous. 

 Surface of pileus zonate. 



H. 



Teeth in age dull colored, gray or brown. 



Pileus regular, stem subcentral, substance uniform. 



Pileus more or less infundibuliform, strigose, with a sterile 



margin 



* 



22. II. zonatum. 



Pileus expanded, umbilicate. 



Zonations elevated; pileus less than 4 cm. wide. 



25. //. fasciatu m . 



Zonations not elevated;pileus more than 4 cm. wide. 



23. //. confluens. 



* If obscurely zonate with the funnel more or less filled with a mass of coarse 

 spongy substance cf. H. scrobiculatum. 



