2 

 Fam. I. AGARICACEAE. 



a. Spores white, whitish, or only pale yellowish or pale rose 



Sect. I. Leucosporeae 



b. Spores rose-colored or rusty-pink . Sect. 2. Rhodosporeae 



c. Spores ochraceous or subferruginous (i. e., melleus, avellaneus, 



isabellinus or fiilvus) .... Sect. 3. Ochrosporeae 



d. Spores black-purple, black, or fuscous-ferruginous in one genus 



Sect. 4. Melanosporeae 



Sect. I. Leucosporeae. 



A. Fleshy or somewhat fleshy, putrescent, not reviving after drying up 



I and 2 



1. Lamellae resembling wrinkles and folds with obtuse edges. 

 Lamellae decurrent, dichotomous, somewhat waxy Canthat^llus 

 Lamellae not decurrent. Our single species is a saprophyte on 



other Hymenomycetes ...... Nyctalis 



2. Lamellae not mere folds or wrinkles, edges thin . . a dr-' b 

 a. Tramal tissue containing pyriform or globose vesicular cells. 

 Lamellae exuding a white or colored milk where cut or broken 



Lactarius 



Lamellae not exuding a white or colored juice ; pileus usually 



bright colored and fragile, often acrid to taste ; spores globose, 



echinulate ....... Russula 



h. Tramal tissue not containing vesicular cells . . • § & §§ 

 § Very watery and waxy fungi, with waxy lamellae not easily sep- 

 arable into two plates ..... Hygrophorus 



§§ Not especially waxy ; lamellae separable into two plates * & ** 

 * Stem normally central in its attachment to the pileus f — tttt 

 t Stem with both volva and annulus . . . Amanita 



tt Stem with volva only — no annulus present. The few species are 

 included under Amanita in Peck and Stevenson, but form 

 the genus Amanitopsis of Saccardo's Syll. Fun. 

 ttt Stem with an annulus but lacking a volva . . -»-&■«--)- 

 -I- Lamellae neither sinuate nor decurrent . . . Lepiota 

 -4-H- Lamellae sinuate or decurrent . . . . Armillaria 



tttt Stem lacking both volva and annulus . . •<-&-»-•<- 

 -1- Lamellae decurrent. 



