292 SECTIOX HYGROCYBE 



Stipe whitish, finally drab, smooth, at first equal, becoming obconi- 

 cal as the pileus expands and the perforation enlarges. 



Spores 8-11 X 4-5.5 tt, ellipsoid-cylindric, pure white in deposits, 

 non-amyloid. Basidia 40 X 8 n, 4-spored. Pleurocystidia and cheilo- 

 cystidia none. Gill trama parallel, hyphae 14-20 fx broad. Cuticle of 

 parallel hyphae with thin- walled cells 85-150 X 10-11 p.. Clamp con- 

 nections present. 



Habit, Habitat, and Distbibution — On soil, under bamboos, 

 Trinidad, October (Dennis 184). 



Material Studied — trixidad: Dennis 184. 



Obsebvations — Dennis (1953) states that this seems to be the 

 West Indian representative of H. ovinus Fr. from which it differs in its 

 slender stature and perforate pileus. Petch noted a strong nitrous odor 

 not present in the Trinidad collection. We have studied Dennis' collec- 

 tion (No. 184) from Trinidad, and have recorded our observations as 

 follows: Spores 8-11 X 5-6(7) fx, ellipsoid, smooth, pale yellowish in 

 Melzer's reagent. Basidia 40-52 X 7-9 /x, 2- and 4-spored. Pleurocys- 

 tidia and cheilocystidia none. Gill trama parallel, hyphae 7-16 /x broad. 

 Lactifers in gill trama, 25-4 fx broad. Cuticle undifferentiated, surface 

 hyphae erect to repent brown, 3-9 fx broad, terminal elements cysti- 

 dioid. Clamp connections few. 



108 



Hygrophorus virescens, sp. nov. 



Illustrations : 



Fig. 55; also 7a. 



Pileus 2-4.5 cm latus, luteus obscuro-aurantio colore inmixtus, niox 

 viridis, non viscidus, rimosus, lobatus; lamellae adnexae, pallido-viri- 

 des, marginibus serratae; stipes 3-6 cm longus, 3-8 mm crassus, viridis; 

 sporae 7-9(10) X 5-6.5 /x, ellipsoideae. Specimen typicum in Herb. 

 Univ. Mich.; ledum prope Trinidad, Calif. Dec. 14, 1956, A. H. Smitli 

 56649. 



Pileus 2-4.5 cm broad, obtuse when young, becoming plane or 

 nearly so, the margin often curved up in age; color variable: when 

 young near honey yellow with dull orange variously present, soon be- 

 coming "lime green"; glabrous, moist but not viscid, in age the margin 

 rimose, often variously lobed and splitting. Context lime green, un- 

 changing where bruised, very fragile; odor and taste not distinctive. 



Lamellae adnexed, attached to the stipe apex by a tooth, whitish 

 with lime green tones near the pileus, edges paler, serrate. 



Stipe 3-6 cm long, 3-8 mm thick, lime green, base whitish, moist or 



