NATURAL HISTORY SURVEY 101 



Lamellae adnate, ascending, broad, white-cinereous then 

 blackish. 



Stem fragile, fistulose, lax, somewhat flexuous, slightly scurfy 

 then smooth, white. 



In dense cespitose clusters on rotten stumps. Glen Ellyn. 

 June to October. Pileus 4 to 12 nun. broad; stem 12 to 25 mm. 

 long, scarcely a millimeter thick, subpellucid when moist; spores 

 ellipsoid, 7 to 8 x 4 to 5 p.. Closely resembling in appearance a 

 small Coprinus, but the lamellae are not deliquescent. 



The species was found in large numbers upon the lawn of Prof. 

 Mullenix, Wheaton, in autumn, L901, probably deriving its 

 nourishment from decaying buried roots of trees. 



GOMPHIDIUS. 



Hymcnophore decurrent on the si em; lamellae composed of a 

 mucilaginous membrane, scissile, continuous at the acute edge, 

 pruinate with the blackish fusiform spores; veil viscous-noccose. 

 Growing on the ground, fleshy, putrescent; pileus at length 

 turbinate; lamellae decurrent, distant, soft. 



Gomphidius viscidus Fr. 



Pileus fuscous-rufous, compact, at first campanulate, then 

 expanded, umbonate, slightly viscous, shining when dry; flesh 

 yellowish. 



Lamellae deeply decurrent, distant, the shorter ones adnexed 

 to the longer, not truly branched, at first somewhat olive, at 

 length fuscous-purple, clouded with the spores. 



Stem solid, equal or attenuated at the base which is rhubarb- 

 colored internally, scaly-fibrillose, not very viscous, yellowish; 

 cortina very evidently noccose, not glutinous, woven in the form 

 of a ring, but readily falling off. 



Pileus 5 to 7.5 cm. broad; stem 7.5 to 10 cm. long, 12 mm. 

 thick; spores 16 x 6 /*. 



In pine woods. Millers. October, 1902. Bertolet. 



BOLETUS. 



Stratum of tubes readily separating from the pileus; tubes 

 rather long, mouths circular or angular; spores brownish or 

 whitish. 



1. Tubes white, becoming flesh-colored B. felleus. 



1. Tubes white, yellow or brown, not becom- 

 ing flesh-colored 2 



2. Tubes adnate, stuffed when young 3 



2. Tubes adnate, not stuffed 6 



2. Tubes free, or nearly so < s 



3. Tubes at first whitish 4 



4. Tubes becoming ochraceous; ferrugi- 

 nous where wounded B. affinis. 



4. Tubes not changing color where 



wounded 5 



