88 



MINNESOTA MUSHROOMS 



(a) Cap black or blackish; taste mild 



(b) Cap yellowish to brown or chestnut; taste bitter 

 (2) Tubes not flesh-colored, free; cap reddish or 



brownish, smooth 

 Stem Avithout net-like veins 

 ( 1 ) Cap sticky when moist 

 (a) Tubes adnate, yellow 

 X. Stem dotted above the large ring 



y. 



(b) 



Stem dotted above and below the sticky rint 



Tubes free, whitish or grayish; stem rough- 

 scaly 

 (2) Cap not sticky when moist 



(a) Stem spongy, then more or less hollow; flesh 



blue where bruised 



(b) Stem solid 



X. Tubes changing to blue where bruised, adnate 

 (x) Cap and stem Avhitish or brownish white 

 (y) Cap dark red; stem red, yellow above 



y. Tubes not changing to blue, free ; cap orange- 

 red 



B. nigrellus 

 B. felleus 



B. edulis 



B. luteus 

 B. subluteus 



B. scahcr 



B. cxanescens 



B. pallidas 

 B. hi color 



B. versipellis 



Boletus vermiculosus Scaly Boletus 



Cap 6-12 cm. wide, vellowish or reddish brown, more or less rough hairy or 

 scaly, sometimes smooth, dry, convex, flesh whitish, turning blue where bruised ; 

 stem 5-10 cm. by 1-2 cm., yellowish, nearly smooth, solid; tubes nearly free, 

 yellowish, mouths brownish orange, then blackish, changing to blue when bruised; 

 spores yellow-brown, elliptic, 10-12 X 4-5^. The name has no evident application. 



On the ground in woods, summer and autumn ; not tested. 



Boletus luridus Lurid Boletus 



Cap 5-10 cm. wide, olive-brown to sooty, somewhat sticky, more or less hairy, 

 convex; flesh yellow, turning blue where bruised; stem 5-8 cm. by 1-2 cm., 

 bright red or vermilion, orange above, netted or dotted, solid ; tubes free, yellow, 

 then greenish, mouths red, then orange; spores greenish, elliptic, 15 X 9/^. The 

 name refers to the color. 



On the ground in leaf mold, summer and autumn. This species is of bad repute, 

 but Mcllvaine has eaten it and calls it delicious. It should be most carefully tried 

 by the beginner. 



Boletus nigrellus ■ Black Boletus 



Cap 7-15 cm. wide, blackish, dry, smooth or nearly so, convex to plane ; flesh 

 white, unchanging; stem 3-6 cm. by 1-2 cm., blackish or paler than the cap, 



