90 THE AGARICACEAE OP MICHIGAN 



short stem. The pileus is relatively much broader than the stem 

 and is often exceedingly rough-scabrous on the surface, especially 

 in dry weather. It seems distributed over the northeastern portion 

 of the United States, but is not often collected. The stem is often 

 spotted with darker spots. 



60. Lactarius scrobiculatus Fr. (Poisonous) 



Syst. Myc, 1821. 



Illustrations : Cooke, 111., PI. 971. 



Gillet, Champignons de France, Xo. 392. 

 Patouillard, Tab. Analyt, Xo. 109. 

 Michael, Fiihrer f. Pilzfreunde, Vol. II, Xo. 53. 

 Hard, Mushrooms, Fig. 133, p. 169, 1908. 

 Eicken, Bliitterpilze, PI. 9, Fig. 2. 



PILEUS 7-17 cm. broad, convex-depressed, at length infumlibuli- 

 form, varying azonate to markedly zonate, viscid when moist, often 

 covered by a thin, hairy tomentum, straw-yellow to dark oehraceus. 

 becoming subferruginous and areately cracked when dry, margin, at 

 first involute and tomentose-hairy or densely fringed. FLESH com- 

 pact, firm, white, changing to yellowish from the milk. GILLS ad- 

 nate, subdecurrent, narrow, crowded, sometimes forked or anas- 

 tomosing on stem, whitish or yellowish, darker where wounded, 

 STEM 3-6 cm. long, 2.5-3 mm. thick, stout, short, equal, stuffed then 

 hollow, glabrous, concolor or paler than pileus, with deprcssed i 

 roundish spots of a brighter color. SPORES subglobose-elliptical 

 "minutely echinulate, 6.5-7x8-10 micr., white." (Burl.) MILK white, 

 changing quickly to sulphur-yellow, acrid. Poisonous. 



Gregarious. On the ground in moist woods, or along mossy mar- 

 gins of swamps, mostly in coniferous regions. Bay View, Huron 

 Mountains, New Richmond. July-August. Infrequent. 



The well-marked depressed spots on the stem and the tomentose- 

 hairy margin distinguish it. The margin finally becomes spread- 

 ing or elevated and the tomentosity gradually disappears. The 

 zones of the pileus may be very obscure or quite distinct; in one 

 large specimen I counted seventeen zones. It is a magnificent 

 mushroom when in full luxuriance, but is not often found. 



