336 



THE AGARICACEAE OF MICHIGAN 



recognized, and the different spores. A more careful comparison 

 ehows slight differences in the colors. It is often hidden by the 

 leaves, especially in the late fall. 



318. Cortinarius heliotropicus Pk. 



N. Y. State Mus. Bull. 91, 1905. 

 Illustration: Ibid, PI. P., Fig. 1-7. 



"PILEUS 2.5-G.5 cm. broad, broadly campanulate, convex or 

 nearly plane, fibrillose, viscid, heliotrope-purple, generally spotted 

 <»• variegated by yellowish-white spots. FLESH whitish, thin. 

 GILLS narrow, thin, close, rounded behind, adnexed, concolorus 

 with the pileus when young, cinnamon when mature. STEM 3.5-7 

 (in. long, 4-8 mm. thick, firm, solid or spongy within, usually slightly 

 thickened at base, silky-fibrillose, viscid, whitish and spotted ivith 

 purple or colored like the pileus, white within. SPORES 10-12.5 x 

 5-6 micr., elliptic. TASTE mild or slightly acrid. ODOR slightly 

 of radish. 



'In woods. Smithtown, New York. August. 



"This is one of the most beautiful species of Cortinarius. In 

 some specimens the spots on the pileus are large or confluent, in 

 others they are almost or entirely absent, but usually they are small 

 and distinct. The purple color of the gills is persistent for some 

 time. In large specimens the margin is sometimes adorned by fibril- 

 lose scales of the veil." 



This and the two preceding are all of medium size and beautifully 

 colored. The description and notes are adopted from Peck. This 

 species seems to differ from C. iodes mainly in the larger spores and 

 perhaps in taste and color. 



SUBGENUS BULBOPODICM: Stem dry. at first hidden, then 

 usually stout, with a thick, abrupt, marginate-depressed bulb, to 

 wln.se margin is attached the cortina; the universal veil is either 

 manifest or lacking in the young stage. Pileus with a viscid pell- 

 icle; equally fleshy. 



This is the section "Scauri" of Fries. The structure of the 

 bull* ami the development of the stem is unique among the Cor- 

 linarii, and the group deserves equal rank with the other subgenera. 

 The -hut ton" stage of the young plant consists only of pileus and 

 bulb, the former smaller than and closely pressing on the bulb. 

 The rest of the stem is invisible, since its beginnings are enclosed 



