96 THE AGARICACEAE OF MICHIGAN 



67. Lactarius pyrogalus Fr. (Poisonous) 



Syst. Myc, 1821. 



Illustrations: Gillet, Champignons de France, No. 390. 

 Ricken, Bliitterpilze, PL 11, Fig. 2. 

 Patouillard, Tab. Analyt., No. 121. 



PILEUS 4-6 cm. broad, convex then plane and depressed, gray to 

 livid-gray or brownish-gray, darker in the center, zoned toward 

 margin, moist in wet weather but not viscid, glabrous, margin at 

 first involute then spreading. FLESH white, compact, thick. 

 GILLS adnate-subclecurrent, subdistant to distant, firm, thin, mod- 

 erately broad, yellowish. STEM 3-5 cm. long, 6-10 mm. thick, equal 

 or tapering downwards, glabrous, becoming hollow, concolor or 

 paler, white-mycelioid at base. SPORES subglobose, echinulate, 

 6-8 inicr., pale ochraceous. CYSTIDIA abundant, subcylindrical, 

 67-70x9 micr. MILK white, very acrid, abundant, persisting as 

 coagulated yellowish globules on the edge of the gills. Poisonous. 



On the ground in woods. Bay View, Marquette, Ann Arbor. 

 July-August. Infrequent. 



Known by its distant gills which become yellowish, the subzonate 

 gray pileus and the milk. The milk often remains as coagulated 

 drops on the gills. 



68. Lactarius chrysorheus Fr. (Poisonous) 



Epicrisis, 1836-38. 



Illustrations: Cooke, 111., PL 984. 



Gillet, Champignons de France, No. 379. 

 Ricken, Bliitterpilze, PL 13, Fig. 4. 

 Atkinson, Mushrooms, Fig. 123, 1900. 



PILEUS 4-10 cm. broad, convex and broadly umbilicate, then ex- 

 panded-depressed to subinfundibuliform, dry or subviscid, glabrous, 

 color variable, whitish to yellowish tinged incarnate, zoned with 

 dull orange or yellow, sometimes almost fulvous, spotted, margin 

 at first involute then pruinose-tomentose, then elevated. FLESH 

 whitish then yellowish from the milk, medium thick. GILLS ad- 

 nate-decurrent, crowded, less so in age, narrow, some forked at base, 

 thin, white at first, soon dingy yellowish, stained darker in age. 

 STEM 4-6 cm. long, 1-1.5 cm. thick, equal or subequal, pruinose, 



