NATURAL HISTORY SURVEY 21 



26 With an annulus 27 



Without an annulus 28 



:27 Lamellae free Agaricus. 



Lamellae aclnate Stropharia. 



12 ^ Lamellae sinuate, cortina often fringing the 



margin of the pileus, stem fleshy Hypholoma. 



Lamellae aclnate, stem cartilaginous 29 



J'.i Margin of pileus incurved when young Psilocybe. 



Margin of pileus always straight Psathyra. 



30 Lamellae deliquescent Coprinus. 



Lamellae not deliquescent 31 



31 Pileus flesh}*, margin not striate, ring want- 



ing Panaeolus. 



Pileus as in Panaeolus, ring present Anellaria. 



Pileus membranaceous or slightly fleshy, 



striate or sulcate Psathyrella. 



Pileus fleshy, lamellae decurrent, subgelatin- 



ous Gomphidius. 



FAM. II. POLYPORACEAE. 



1 Plant fleshy, putrescent , stem central or nearly 



so 2 



Plant coriaceous, horny or woody (fleshy in 



some species of Polyporus but becoming dry) 3 



2 Tubes long, easily separable from the pileus 



and from each Other Boletus. 



Tubes less easily separable, pileus and stem 



squarrose-squamose Strobilomyces. 



Tubes with mouths distinct from each other; 



stem lateral Fistulina. 



Tubes in radiating rows, not easily separable, 



stem often eccentric Boletinus. 



3 Tubes in a distinct layer, preformed, not sep- 



arable, not stratose; fleshy or tough but not 



woody; stipitate or sessile Polyporus. 



Tubes as in Polyporus but usually stratose; 



pileus woody from the first, usually sessile. . Fomes. 



Tubes as in Polyporus, not stratose, develop-, 

 ing from the center outward toward the 

 margin of the cap; coriaceous or mem- 

 branaceous Polystictus. 



Tubes as in Polyporus or Polystictus; plant 

 resupinate, effused, with no true pileus; 

 waxy, coriaceous or membranaceous Poria. 



Tubes extending to unequal depths into the 

 substance of the pileus, not forming a dis- 

 tinct stratum; sub-cylindrical, corky, not 

 stratose, sessile or resupinate Trametes. 



Tubes as in Trametes, but sinuous to laby- 



rinthiform; corky, not stratose, sessile. . . .Daedalea. 



