214 SECTION HYGROCYBE 



SUBSECTION PSITTACINI Bataille 



Flore Monogr. Hygrophores, p. 50. 1910. 



Characters as given in key, p. 108. 



Type species: Hygrophorus psittacinus Fr. 



Key to Series 



I. Pileus sharply conic Series Puri, below 



1 . Pileus obtuse to depressed 2 



2. Pileus color gray to dull brown, deep vinaceous brown or dull yellow- 

 brown Series Inolentes, p. 218 



2. Pileus in red, yellow, blue, or green series . . .Series Psittacini, p. 224 



SERIES PURI ser. nov. 



Pileus conicus vel acute conicus. 

 Type species: Hygrophorus purus Pk. 



Key to Species 



1. Pileus white 124. H. purus 



1. Pileus colored 2 



2. Blackening when cut or bruised a 



a. Lamellae yellow to orange 125. H. singed var. singeri 



b. Lamellae whitish 126. H. singeri var. albifolius 



2. Not blackening as above; pileus red 127. H. ruber 



124 



Hygrophorus purus Pk. 



N. Y. State Mus. Ann. Rept. 26: 63. 1874 



Hydrocybe pura (Pk.) Murr., North Amer. Flora 9: 377. 1916. 



Illustrations: 

 Fig. 62. 

 Smith and Hesler, Elisha Mitchell Sci. Soc. Jour. 56, pi. 9, below. 



Pileus (2.5)4-7.5 cm broad, conic, conic-campanulate, broadly 

 conic, or with the margin recurved in age, white, tinged pinkish red 

 where wounded, glabrous, viscid, finely rivulose, margin pellucid- 

 striate. Context thin, white, very waxy; odor and taste mild. 



Lamellae uncinate, snow white, subdistant, rather broad, ventri- 

 cose, edges even. 



Stipe 4-8 cm long, 3-8 mm thick, white and shining, base tinged 

 pinkish red where wounded, equal or tapered slightly either way, 

 sometimes flexuous or curved at the base, glabrous, glutinous, hollow. 



Spores 7-9 x 4-5 /x, ellipsoid, smooth, pale yellow in Melzer's 





