16 rUXGUS-FLOKA 



crowded, somewhat divided behind, pallid at first, then pink- 

 ish-yellow ; stem I5-2 in. long, 1 in. and more thick, attenu- 

 ated downwards, often obliquely ascending or curved, pallid, 

 becoming fragile, stuffed then hollow; milk acrid, white, 

 soon becoming reddish; spores subglobose, echinulate, 8-9 

 X 6-8 /x. 



' Lactariiis acris, Fries, Epicr., p. 342 ; Cke., Hdbk., p. 310; 

 Cke., Illustr., pi. 1005. 



In woods. 



Stinking; acrid, milk white then reddish; spores 6 /i, 

 diameter. (Cooke.) 



Lactarius (Piper.) umbrinus. Pers. 



Pileus 2-3 in. across, fleshy, firm, not thick, convex then 

 plane, the centre becoming slightly depressed, often wavy 

 and excentric, absolutely dry, flocculoso-rivulose, more or 

 less intense olivaceoiis-umber, paler and yellowish when old ; 

 flesh firm, white; milk white, acrid, forming grey spots 

 when it has escaped ; gills slightly decurrent, thin, crowded, 

 forked behind, 1 line or a little more in breadth, pallid, 

 dingy yellowish; stem solid, compact, stout, up to 1 in. long, 

 about 1^ in. thick, attenuated upwards, even, colour of the 

 pileus or paler, apex white ; spores globose, rough, 8 jx diam. 



Lactarius umbrinus, Pers., Syn., p. 435 ; Fries, Epicr., p. 

 339; Cke., Hdbk., p. 310; Cke., Illustr., pi 1006. 



In pine woods, &c. 



ComjDact, but the pileus not thick, often flexuous, some- 

 times becoming pale. Stem scarcely 1 in. long ; gills some- 

 what decurrent, forked behind. (Fries.) 



Lactarius (Piper.) pergamenus. Fr. 



White. Pileus 2-3 in. across, flesh rather thick at the 

 disc, thin elsewhere ; pliant, convex then plane and the 

 centre depressed, often wavy, not zoned, glabrous, minutely 

 wrinkled ; gills adnate, very narrow, horizontal, very much 

 crowded, branched, white at first, soon becoming straw- 

 colour ; milk white, unchangeable, acrid ; spores broadly 

 elliptical, echinulate, 7 X 5-6 /x; stem 3-4 in. long, ^| in. 

 thick at the apex, usually more or less attenuated downwards, 

 glabrous, becoming discoloured, stuffed. 



Lactarius ])ergamenus. Fries, Epicr., p. 340 ; Cke., Hdbk,, 

 p. 310; Cke., Hlustr., pi. 978. 



