REVISIONS OP CEYLON FTHSTGI. 401 



Russula periglypta has a pileus up to 9 cm. in diameter ; it is 

 at first hemispherical, depressed or umbiHcate in the centre, 

 then almost plane, finally infundibuliform ; the margin is 

 smooth when young, becoming strongly sulcate with the 

 ridges tuberculate ; the colour is white, sometimes greyish or 

 greenish in the centre ; it is sUghtly viscid when young, 

 strongly viscid in wet weather, with shining patches when 

 dry ; the flesh is rather thin, and white throughout. The 

 stalk is 2 to 7 cm. high, 1 to 1-8 cm. diameter, white, longi- 

 tudinally striate with innate fibrils, equal, or swollen at the 

 base, or attenuated below, spongy-stuffed, fragile when old. 

 The giUs are white, cream coloured or yellowish when old, 

 arcuate at first, then rather ventricose, outer ends rounded, 

 up to 7 mm. broad, adnate with a slight decurrent tooth, 

 becoming free, rather distant, occasionally forked near the 

 stalk ; interstices veined. The spores are creamy white, 

 globose, 5-7 M diameter, or somewhat oval, 8 X 6 /f, beset 

 with coarse, blunt spines. Taste mild. 



Hygrophorus alutaceus was said to have " Pileo umbiHcato 

 glabro ; margine arcuato striato ; stipite obconico ; lameDis 

 arcuatis longe decurrentibus alutaceis," while Russula 

 periglypta was described as " Candidus ; pileo hemisphserico 

 viscido umbiUcato sulcato ; stipite deorsum angustato solido ; 

 lamellis arcuatis postice acutis attingentibus. Interstices 

 reticulate. Spores globose, echinulate, "00025 inches 

 diameter." 



The parasitized specimens measure 2 to 5 cm. in diameter, 

 and usually remain hemispherical, often with irregular un- 

 dulating sweUings ; they never become infundibuUform, but 

 are often depressed in the centre ; the colour is dull red or 

 pink, sometimes blackish in the centre, often with pale 

 ochraceous patches also, usually somewhat mottled ; the pink 

 coloration may extend over the edges of the gills, and some- 

 times the stalk also is pink ; they are viscid when moist ; as a 

 rule, the margin is not striate, but in some instances it is 

 striate on one side. The gills are crowded and thickened, 

 usually vertically corrugated : they never produce Russula 

 spores. I have no doubt that this represents Berkeley's 

 Ceylon specimens of Russula emetica. 



