170 THE AGARICACEAE OP MICHIGAN 



the stem; as the plant matures the veil collapses on the stem and 

 in most cases causes the stem to appear viscid and at length spotted 

 or blotched by the drying remnants of this veil. In our species 

 this veil is scanty and it apparently disappears very early, and in 

 most cases cannot be definitely seen. Our species occur in swampy 

 ground or in tamarack bogs. Only three species have been found 

 in the state. G. nigricans Pk. reported in the 8th Eep. Mich. Acad. 

 Sci., is doubtful. G. rhodoxanthus (Schw.) is referred to Paxillus. 



Key to the Species 



(a) Pileus 2-5 cm. broad, obtuse or depressed; stem dry, becoming red- 



disb-black spotted, yellow at base. 152. G. maculatus Fr. 

 (aa) Pileus 1-2.5 cm. broad, often umbonate; stem at first viscid from 

 the veil, slender. 

 (b) Stem yellow downwards. 154. G. flavipes Pk. 

 (bb) Stem brick color to wine-reddish; not yellow at base. 153. G. 

 vinicolor Pk. 



152. Gomphidius maculatus Fr. 



Epicrisis, 1836-38. 



Illustrations: Ricken, Blatterpilze, PL 3, Fig. 2. 

 Plate XXIII of this Report. 



PILEUS 2-5 cm. broad, convex, obtuse, soon plane or depressed, 

 with a viscid, separable pellicle, glabrous, brownish-incarnate to 

 pale clay color, rugulose, spotted and shining when dry. FLESH 

 thick, soft, white or faintly incarnate. GILLS decurrent, narrowed 

 behind, thickish, subdistant to distant, distinct, subgelatinous to 

 soft-waxy, dichotomously forked, at first whitish, then pale 

 olivaceous-gray, final!// smoky, moderately broad. Stem 4-7 cm. long, 

 apex 5-12 mm. thick, tapering downward, solid, firm, even, whitish 

 above or with a tinge of incarnate, at first dotted with reddish 

 scurf, glabrescent, becoming black-spotted or blackish in age or 

 when handled, base yellow. VEIL none or very evanescent. 

 SPOKES variable in size, cylindrical-subfusiform to elongated- 

 elliptical, 15-23x6-7.5 micr., smooth, pale smoky-brownish under the 

 microscope. CYSTIDIA abundant on sides and edge of gills, 

 cylindrical, obtuse, variable, 100-135x15-25 micr. TASTE mild. 

 ODOR none or slight. 



Gregarious, subcaespitose or scattered, under tamarack trees 

 (Larix), in bogs, on moss or debris. Between Chelsea and Jack- 

 son. October-Xoveinber. Pare or local. 



Apparently this species occurs only in restricted localities in the 

 bogs. near inland lakes. This is the largest form so far found in 



