124 THE AGARICACEAE OF MICHIGAN 



(f) Stem at length ashy or blackish where bruised. 



(g) Wound at first reddish then black; pileus dull red, 

 variegated with yellow etc., firm. 126. R. rubescens 

 Beards, 

 (gg) Wound not at first reddish. 



(h) In coniferous regions; stem stout. 



(i) Pileus 5-12 cm. broad, orange-red. 123. R. de- 



colorans Fr. 

 (ii) Pileus 5-10 cm. broad, crimson-red. 123. R. de- 

 coJorans var. rubriceps Kauff. 

 (hh) In frondose regions; stem not very stout; pileus 

 dark red to blackish on disk. 125. R. obscura 

 Rom. 

 (ff) Stem not becoming ashy. 



(g) Pileus 5-10 cm. broad or more. 



(h) Plants usually solitary or scattered, 

 (i) Pileus firm, large, dingy or dull red to purplish, 

 often faded; gills ochraceous from the first. 128. 

 R. alutacea Fr. 

 (ii) Pileus and stem very fragile; colors of pileus 

 mixed varying pink, incarnate, yellowish; spores 

 bright yellow. 145. R. amygdaloides sp. nov. 

 (iii) Pileus firm, blood-red. 127. R. borealis Kauff. 

 (hh) Closely gregarious, sometimes in troops; fragile. 

 (i) Pileus dull and variable in color, not bright red; 

 gills white at first, then creamy-yellowish to pale 

 ochraceous. 144. R. Integra Fr. and forms, 

 (ii) Pileus dark violet-purple to dark red; rather firm; 

 spores ochraceous-buff. R. ochrophylla Pk. 

 (gg) Pileus 2-5 cm. broad or less. • 



(h) Spores pale yellow or cream color, 

 (i) Pileus umbonate, very fragile; on sphagnum. 148. 



R. sphagnopMla Kauff. 

 (ii) Pileus not umbonate; stem and gills translucent, 

 honey-yellowish in age; fragile. 147. R. puel- 

 laris Fr. 

 (hh) Spores truly ochraceous in mass. 



(i) Stem rosy-dusted; pileus rose-red, fragile. 146. 



R. roseipes (Sec.) Bres. 

 (ii) Stem white; pileus pinkish red, lilac etc., fading 

 to yellowish. 149. R. chamaeolentina Fr. 150. 

 R. abietina. etc. 

 (dd) Pileus some shade of yellow, 

 (e) Flesh of stem cinereous when old. 



(f) Pileus orange-red, fading in age. 123. R. decolorans 



Fr. 

 (ff) Pileus dull yellow (flavus), color not changing, scarcely 

 viscid. 124. R. flava Rom. 

 (ee) Flesh not becoming ashy. 



(f) Edge of gills vivid lemon-yellow. R. aurata Fr. 

 (ff) Edge of gills concolor. 



(g) Taste mild; pileus 2-6 cm. broad, gills egg-yellow. 151. 



R. lutea Fr. 

 (gg) Taste tardily acrid; pileus 5-10 cm. broad; gills pale 

 yellow. 13S. R. aurantialutea Kauff. 



COMPACTAE Fr. Flesh thick, compact and firm. Pileus with- 

 out a separable pellicle, its margin non-striate and at first involute. 

 With entire and short gills alternating regularly. Spores white in 

 mass. 



