- 



THE AGARICACEAE OF MICHIGAN 



fcaste. However, I suspect the species with the bitter pellicle should 

 be kept distinct. Seme of my collections had caps which were 

 more tawny or rusty-ochraceous than the descriptions allow. The 

 fundamental characters are the caesious or pale gray-drab young 

 -ills, the white flesh of the stem and mostly of the cap, and the 

 spores. This species is a segregate of G. glaucopus Fr. and some 

 of m y collections agree well with the color, size and shape of the 

 Friesian plates at Stockholm, but the flesh, especially of the stem, 

 does not turn yellowish. The European authors agree that the 

 spores of C. glaucopus measure 8-9x5-6 micr. Forms occur which 

 have a subaromatic odor, resembling ripe pears. As is often the 

 case in this subgenus, when the plant develops during heavy rains, 

 the glutinous pellicle dissolves away in part, and the pileus is later 

 merely subviscid. 



336. Cortinarius glaucopus Fr. 



Syst. Myc, 1821. 



Illustration: Ricken, Die Bliitterpilze, PI. 35, Fig. 7. 



PILEUS 5-12 cm. broad, convex, then expanded-plane, firm, 

 rigid, often wavy on the geniculate margin, viscid or glutin- 

 ous, variegate fulrous-streaked on a slate-gray or steel-gray 

 ground-color, margin greenish-gray, at first inflexed, disk ful- 

 vous. FLESH whitish then yellowish-tinged, thick, compact. 

 GILLS adnexed then emarginate, moderately broad, close to crowd- 

 ed, at first violaceous blue, then clay-cinnamon. STEM 5-10 cm. long 

 (sometimes shorter), 15-25 mm. thick, rigid, pallid with a pale vio- 

 laceous-blue tinge, becoming yellowish in age, flesh violaceous-bluish 

 to whitish then sordid yellowish, solid, almost equal above the 

 abrupt, marginate, scarcely bulbous base, attached to a white my- 

 celium. SPORES almond-shaped, subinequilateral, slightly rough- 

 punctate, 8-9 x 4-5 micr. BASIDIA 28-30 x 7 micr., 4-spored. ODOR 

 and TASTE mild. 



In dense, caespitose troops. On the ground, under or among 

 leaves, in frondose woods of oak, maple, etc. Ann Arbor. Septem- 

 ber-October. Abundant locally, but infrequent; after heavy rains. 



Only the luxuriant form of this species is known to me. A squatty 

 form is said to occur, probably in dry weather. The colors are 

 difficull t<> describe and vary during development The fresh, ma- 

 ture pileus usually has a steel-gray metallic lustre in wet weather, 



