SUBSECTIOh HYGROCYB1 193 



Fiu. 55. //. virc.scens 



dry, somewhat striate in age. Tubular to hollow, terete or compressed. 



Spores 7-9 ( 10) X 5-6.5 /*, ellipsoid, smooth, yellow in Melzer's rea- 

 gent. Basidia 40-55 X 7-10 p, 2- and 4-spored. Pleurocvstidia and chei- 

 locystidia none. Gill trama parallel to subparallel, hyphae 8-20 /* broad. 

 Cuticle of repent, non-gelatinous hyphae, not sharply differentiated 

 from the pileus trama, a cutis. No hypodermium differentiated. Pileus 

 trama of radial, parallel to subparallel hyphae, in tangential view the 

 ends of the hyphae present a pseudoparenchyma-like appearance. 

 Clamp connections present. 



Habit, Habitat, and Distribution — Caespitose under redwood. 

 California, December. 



Material Studied — California: Smith 56649 (type, from Trini- 

 dad, Dec. 14, 1956). 



Obsebvations — Although this species has been collected only 

 once, it is very distinctive. Because of the non-gelatinous cuticle on 

 both pileus and stipe, it cannot be placed in H. psittacinus. When 

 dried, the pilei of H. virescens are near warm buff in color. Moreover, 

 the green color develops as the carpophore matures, whereas in //. 

 psittacinus the green pigment is present in young buttons. 



109 



Hygrophorus tahquamenonensis Sm. & Hes. 



Sydowia 8: 331. 1954 



Pileus 2.5-5 cm broad, obtusely conic with a flaring margin, color 

 evenly pale ocher yellow and fading to "pinkish buff" or "pale pinkish 

 buff," surface moist and hvgrophanous, when faded minutely squamu- 



