54 



4. Entire plant blackening in drying. G. Oregonensis Pk. 

 Plant not blackening, or only the gluten blackening. 5. 



5. Plant not at all blackening ; stipe more or less tomentose. 6 

 The gluten on pileus blackening ; stipe pruinose at base. G. vinicolor Pk. 



6. Large, 5-8 cm. ; stipe longer than diameter of pileus, thinly brown-tomentose. 



G. viscidus (L. ) Fr. 



Smaller, 2-4 cm.; stipe shorter than diameter of pileus, yellow-tomentose below, 



glabrate above. G Alabamensis Earle. 



7. Entire plant turning jet black in drying. G. nigricans Pk. 

 Plant not blackening. 8. 



8. Pileus purplish brown ; stipe white, yellow within. G. ghttinosus ( Schaeff. ) Fr. 

 Pileus rose-color ; stipe white, base and interior flesh-color. G. roseus Fr. 



B. Key to the North American Species of Nyctalis 



I. Parasitic on Rtissula, etc. N. asterophora Fr. 



C. Key to the North American Species of Limacium 



1. Pileus white or whitish, disc often colored. 2. 

 Pileus grayish yellow. L. elegantuhim (Pk. ) 

 Pileus with some shades of blue or violet. 7 

 Pileus grayish brown or blackish brown. 8 



2. Pileus with more or less yellow on disc. 4 

 Pileus with brownish disc and innate black fibrils. L. virgatum (Pk.) P. Henn 

 Pileus white throughout. 3 



3. Spores irregular-sphaeroid, 5-6 fi. L. elmrneum (Bull.) Schroet 

 Spores ellipsoid, 6.5-7.5 ( tt X 4-5 /1. L. sordidum (Pk. ) 



4. Lamellae stained greenish yellow with age ; pileus covered with yellow gluten. 



L. palndosum (Pk. ) 

 Lamellae becoming flesh-color ; disc yellow or reddish. L. flavo-discum (Frost) 

 Lamellae white, unchanging. 5- 



5. Pileus with deciduous yellow flecks on the disc and lamellae. 



L. chrysodon (Batsch) Schroet. 

 Pileus smooth, glutinous. 6. 



6. Stipe white, farinose above. L. luteum (Johns.) 

 Stipe yellowish white, apex roughened. L. Laurae (Morg. ) P. Henn. 



7. Pileus bluish-alutaceous, lamellae darker. L. caerulcscens (B. & C. ) 

 Pileus violaceous when moist, paler when dry, lamellae violaceous. 



L. subviolaccttm (Pk.) 



8. Margin of lamellae entire ; stipe white or brown -spotted. 



L. fuligineum (Frost) P. Henn. 

 Margin of lamellae erose ; stipe pallid or brownish. L. Morrisii (Pk ) 



