S( BSECTION HYGROCYBE IS1 



Lactifers in both gill trama, 2-3 /< broad, and pileus brama, 3 ~ ," broad. 

 Cuticle undifferentiated, surface hyphae repent to erect, conspicuous, 



the terminal elements tusoid to subclavate, L2-30 /' broad. Clamp 



connections Found only on Lactifers in <^ill trama. 



76 



Hygrophorus firmus var. occidentalis Dennis 



Kew Bull. 2: 267. 1953 



Pileus up to 6 cm broad, convex, then depressed and often per- 

 forated at the center, pale lemon yellow to apricot yellow, smooth, 



translucent striate. Context concolorous. hygrophanous, thin. 



Lamellae adnate. sulphur yellow, subdistant, of two lengths. 



Stipe lemon yellow, smooth, slightly attenuated upwards, hollow . 



Basidia dimorphous, the larger 35 X 9-10 /x, 2- or 4-spored. the 

 spores 11-14 X 6-8 x*. broadly ellipsoid; the smaller more numerous, 

 30 x 4-5 [x, the spores 5-6.5 x 3-4 ft, ellipsoid-cylindric. Pleurocys- 

 tidia and cheiloc) stidia none. 



Habit, Habitat, and Distbibutiox — On soil in woods, Trinidad. 



Material Studied — tbintdad: Dennis 50A (type). 



Obsebvatioxs — Although Corner has described seventeen varieties 

 of H. firmus from Malaya, Dennis concludes that var. occidentalis does 

 not fit any of the Malayan varieties. It differs from var. firmus in its 

 yellow pileus. 



Notes on the type: Basidia dimorphous, the larger 50-62 X 9- 

 12 fx, mostly 2-spored, bearing spores 9-11(14) X 6-7(8) /x, ellipsoid, 

 smooth, yellowish in Melzer's reagent; the smaller 40-46 X 5-8 xx, 

 mostly 2-spored, bearing spores 5.5-7 X 3.5-4.5 /x, ellipsoid, smooth, 

 yellowish in Melzer's reagent. Pleurocystidia and cheilocystidia none. 

 Gill trama parallel, hyphae broad (12-38 xi). Cuticle undifferentiated, 

 with repent to erect hyphae, the terminal element subfusoid to 

 clavate ( cystidioid ) , 95-140 X 12-18 /x, the tip usually tapering some- 

 what. Clamp connections not found. 



77 



Hygrophorus firmus var. purpureus Dennis 



Kew Bull. 2: 267. 1953 



Illustration: 



Dennis. Kew Ball. 2, fig. 12. 



Pileus 1.5 cm broad, convex, becoming umbilicate, "burnt lake/' 

 silky shining, dry. Context concolorous with the pileus, with a dark 

 purple juice which stains paper, hygrophanous, thin. 



