THE AGARICACEAE OF MICHIGAN 



549. Naucoria siparia Fr. 



gyst. Myc, L821. 



Illustrations: Cooke, 111., PL 480. 



Patouillard, Tab. Analyt., No. 642. 



PILEUS 5-15 mm. broad, broadly convex to plane, obtuse, moist, 

 a1 tirst densely tomentose, breaking up into thick scales of fascicled 

 tufts, especially on disk, dark reddish-brown. FLESH soft, brown- 

 Ish-ochraceous, thin. GILLS adnate, broad, close to subdistant, 

 vrentricose, brownish-clay-color, edge white-flocculose. STEM 1-2 

 cm. long, 1-1.5 mm. thick, short, equal, stuffed, lower two-thirds 

 loosely floccose-fibrillose and reddish-brown, apex glabrous and 

 whitish. SPORES very variable in size and shape, 9-13 (few 15) x 

 5-6 (few 7) niicr., inequilateral-elliptical, smooth, rusty-brown in 

 mass. CYSTIDIA none. STERILE CELLS on edge of gills 

 numerous, subcylindrical or narrowly clavate, about 40x8-9 micr. 

 i: ASIDIA 4-spored, 27x6 micr. ODOR none. 



Gregarious, on soil or moss in frondose woods, among debris. 

 Ann Arbor. August. 



Although this plant is said to usually inhabit the stalks of ferns, 

 our specimens agree so closely with the descriptions that scarcely 

 a doubt can be raised concerning their identity. 



Crepidotus Fr. 

 (From the Greek, krepis, a slipper and ous, an ear.) 



Ochre-brown to rusty-spored. Stem lateral, eccentric or none. 

 Pileus dimidiate, eccentric or lateral, often at first resupinate. 

 Veil Lacking. SPORES sphoeroid or elliptical. 



Putrescent, shelving or resupinate mushrooms, from 1 to 5 cm. 

 broad, growing on decaying wood. They correspond to those 

 Pleuroti of the white-spored group which have no veil. 



The PILEUS is usually of a soft consistency and soon collapses; 

 in some species it is firmer or tougher and a few have a gelatinous 

 surf ace layer. The surface of some forms is tomentose or hairy, of 

 others glabrous; when hygrophanous, they often become pruinose 

 when dry. The hygrophanous species are usually striatulate on the 

 margin of the pileus when moist, but become even when dry. The 

 color of most species is white, dingy-white or yellowish, but C. 

 cinnabarinus has a deep scarlet-red color. The GILLS radiate 



