Porphyrosporee 



The young gills are pure white as are the caps. The stems sometimes Agaricus. 

 taper upward, but they are usually remarkably equal. 

 It is delicate when cooked and of excellent flavor. 



A. tabula'ris Pk. relating to boards. Pileus 5-10 cm. broad, very 

 thick, fleshy, firm, convex, deeply cracked in areas, whitish, flesh whit- 

 ish, tinged with yellow, the areas pyramidal, truncate, the sides hori- 

 zontally striate, their apices sometimes tomentose. LamellaB narrow, 

 close, free, blackish-brown when mature. Stem short, thick, solid. 

 Spores broadly elliptical, 7. 5-90, long, 6-7. 5/* broad, generally contain- 

 ing a single large nucleus. 



In clay soil by roadsides. Craig, Colorado. August. E. Bethel. 



This species is remarkable for the peculiar upper surface of the pileus 

 which is broken into pyramidal areas. The sides of these are marked 

 by parallel lines in such a way that they appear as if formed by small 

 tablets placed one upon another, each successive tablet being a little 

 smaller than the one immediately preceding it. Only dried and broken 

 specimens have been seen by me and the notes of the collector do not 

 give the color of the young lamellae. There is a trace of a thick ring on 

 the broken stem of one specimen. Peck, Bull. Torr. Bot. Club, Vol. 

 25, No. 6, 1898. 



Not elsewhere reported. Edible qualities not given. 



347 



