MICHIGAN ACADEMY OF SCIENCE. 69 



Flesh white, red under the adnate cuticle. Gills yellowish jrom the first, 

 becoming bright ochraceous-buff, dusted by the spores, subdistant, adnate, 

 nearly entire, a few forked, interspaces venose. 8tem 3.5-6.5 cm. long, 1-2 

 cm. thick, reddish, equal or subequal, solid or spongy within. Spores bright 

 ochraceous-buff, globose, 10 micr. Taste mild. Odor not marked. 



Found and reported in New York State and Wisconsin, and probably 

 occurs in Michigan. The aliove is Peck's description. In his 50th report he 

 says this species has the colors of R. drimeia Cke. figured by Cooke. (111. 

 PL 1023.) according to these figures, R. ochrophylla corresponds in color to 

 my R. sericeonitens. Both species have a mild taste. Peck places his specise 

 with the RiGiDAE, and its firm consistency along withthe ochraceous-buff spores 

 and reddish stem separate it from R. sericeonitens. It is interesting to note 

 that both American plants of this dark purple color have a distinct mild 

 taste, while the four species of Europe, considered by some as one species, 

 include acrid types only. Peck "separates R. ochrophylla from R. nluiacea 

 by its deep red color and even margin." 



12. RUSSULA BOKEALIS SP. NoV. 



(The northern red Russula.) 



PiLEUS 5-9 cm. broad, firm and rather compact, convex then piano-de- 

 pressed, outine broadly elliptical, often with a sinus on one side, blood-red 

 disk darker or color uniform and not fading, pellicle som.ewhat separable, 

 hardl}' viscid, margin even or obscurety striate. Flesh white, red under the 

 cuticle, not very thick. Gills ochraceous, subdistant or moderately close, 

 medium broad, broader in front, narrowly adnate, rather distinct, edge often 

 reddish anteriorly, equal, a few forked toward base, interspaces venose. 

 Stem white and tinged red in places, firm, spongy-stuffed, thickened below, 

 5-7 cm. long, 1.5-2 cm.. thick. Spores deep ochraceous-yellow in mass. Taste 

 mild, sometimes slightly and tardily acrid. Odor none. 



Solitary. In mixed woods of hemlock, yellow-birch and hard maple, in 

 the northern peninsula. Huron ^Its., ^Marquette and Munising. August. 



Russula alutacea is usually larger, stouter, the cap dull or sordid red, and 

 with broader gills. Russula ochrophylla occurs in oak woods, has "buff 

 spores, dusted" on yellow gills, and has a violaceous-purple or purple-red 

 cap. Peck saw our plant but did not refer it to either species. This species 

 and R. alutacea show the futility of using the striations on the margin of the 

 cap as an important character to distinguish subgenera. A true pellicle is 

 present in both and is often quite easily separated especially on the margin, 

 and this with the character of the gills connects them very closely with the 

 Fragiles. R. Linnaei, which is not well known in Europe, looks like it 

 according to Cooke's figures, but has white gills and spores. 



12. Russula alutacea Fr. 



(The tan-gilled Russula.) 



Illustrations: Hard's Mushrooms. 1908. P. 186, fig. 148. Atkinson's 

 Mushrooms. 1900. PI. 36, p. 126, fig. 2. 

 PiLEUS 8-15 cm. broad, large, firm, convex then plano-depressed, with 

 dull colors, dark reddish-purple, sordid red, sometimes mixed with other 

 shades, but the reddish color predominating, with separable pellicle, smooth, 

 somewhat viscid in wet weather, pruinose or subgranulose in dry weather, 

 margin even or later rather tubercular-striate. Flesh white, thick on disk. 



