APPENDIX XI 747 



Stem smooth, stuffed or hollow, bulbous, white or whitish, the bulb often 

 stained with yellow. 



Cap 2 to 4 inches broad; stem 3 to 5 inches long, 3^ to K inch thick. 

 This species frequents hemlock woods, occurring from July to September. 



Agaricus Rodmani {Edible) 



Cap firm, rounded, convex, then nearly plane, white, becoming subochraceous, 

 smooth or cracked into scales on the disk, margin decurved; flesh white; gills nar- 

 row, close, white, changing to pink and blackish-brown; stem solid, short, whitish, 

 smooth, or perhaps mealy, squamulose above the ring; ring double, sometimes ap- 

 pearing as two collars with space between. 



Cap 2 to 4 inches broad; stem 2 to 3 inches long, 6 to 10 lines thick. 



Agaricus Rodmani may easily be mistaken for Agaricus campestris, but can be dis- 

 tinguished by the thicker, firmer flesh, narrower gills, which are nearly white when 

 young, and peculiar collar, which appears double. This species grows on grassy 

 ground, often springing from crevices of unused pavements or between the curbing 

 and the walk. It is to be found principally from May to July. 



Agaricus silvicola (Edible) 



Cap convex, expanded to almost plane, sometimes umbonate, smooth, shining, 

 white, often tinged with yellow, sometimes with pink, especially in the center; flesh 

 white or pinkish; gills thin, crowded, white, then pink, later dark brown, distant 

 from stem, generally narrowed toward each end; stem long, bulbous, stuffed or hol- 

 low, whitish, sometimes yellowish below; ring membranaceous, sometimes with 

 broad floccose patches on the under side. 



Cap 3 to 6 inches broad; stem 4 to 6 inches long, 4 to 8 lines thick. 



Agaricus silvicola has been known under various names, at one time being consid- 

 ered merely a variety of Agaricus arvensis. By Peck^ it has been recognized as a 

 distinct species, A . abrupiibulbus. A discussion of the nomenclature of this species 

 may be found in Mcllvaine and Macadam.* 



Agaricus subrufescens (Edible) 



Cap at first deeply hemispherical, becoming convex or broadly expanded, silky, 

 fibrillose, and minutely or obscurely squamulose, whitish, grayish, or dull red- 

 dish-brown, usually smooth and darker on the disk; flesh white, unchangeable; 

 gills at first "white or whitish, then pinkish, finally blackish-brown; stem rather long, 

 often somewhat thickened or bulbous at the base, at first stuffed, then hollow, white; 

 the annulus flocculose or floccose squamose on the lower surface. Two additional 



1 Peck, C. H.: Report of the State Botanist, 1904. N. Y. State Mus. Bull. 94, 

 p. 36, 1905. 



2 McIlvaine, Charles, and Macadam, R. K.: Toadstools, Mushrooms, Fungi, 

 Edible and Poisonous; One Thousand American Fungi, rev. ed., Indianapolis 

 (1912), p. 728. 



