CLASSIFICATION OF AGARICS lo9 



Michigan. The above description is taken from my notes of the 

 Swedish plant as known to Komell, and agrees mostly with that of 

 Bresadola. Most modern mycologists consider the Friesian 

 "rugulose-reticulate'' character of the stem as too uncertain to be 

 practicable. The important characters are: the hard consistency, 

 the wrinkled or veined rarely "cutefracta" surface of the cap, the 

 cuticle not reaching to the margin of tlie cap, and the gills dis- 

 colored in spots. The cuticle apparently ceases to grow so that the 

 surface of the expanding pileus may become somewhat areolate 

 cracked and the margin naked. 



115. Russula subpunctata sp. nov. 



PILEUS 2-5 cm. broad, rigid, convex then expanded-plane to de- 

 pressed, cuticle adnate and scarcely separable on margin, subviscid, 

 soon dry, ^^aZe dull red to rosy-red, often white-spotted where cuticle 

 disappears, minutely rivulose or subgranular, margin even, acute. 

 FLESH compact, firm, rather thick on disk, abruptly thin on 

 margin. GILLS adnate to subdecurreut, thin, slightly attenuate 

 at both ends, not broad, close to subdistant, Avhitish then pale 

 cream-colored, few short or forked at base, pruinose, intervenose. 

 STEM 2-4 cm. long, 4-10 mm. thick, subequal or tapering dowm, 

 .spongy-stuffed, becoming cavernous, white or rosy-tinged, unchang- 

 ing, attached at times to roots and forming mycorhiza. SPORES 

 subglobose, rough-reticulate, 9-11x7-9 micr. (incl. apiculus), creamy- 

 white in mass. CYSTIDIA abundant, subcylindrical, rough, with 

 dark brown granular content, 90-110x8-12 micr. BASIDIA about 

 C5x9 micr. SMbhymeniiim markedly differentiated. TASTE quickly 

 and very acrid. ODOII none. 



Gregarious. On the ground in frondose woods. Ann Arbor. 

 July-August. Infrequent. 



The appearance of this Russula is well shown in Patouillard's 

 figure of R. punctata Gill. (Tab. Analyt., No. 621) with which it 

 agrees except in its very acrid taste. The gills of our plants have only 

 rarely a red edge. The spore print is cream-colored or almost light 

 yellowish. Dr. McDougal found one group of specimens forming 

 mycorhiza on roots of Tilia americana. 



Micro-chemical tests: G. (Flesh slowly light blue; gills un- 

 affected.) S. V. (Flesh and gills quickly deep blue.) F. S. (Cystidia 

 colored brown.) 



