MICHIGAN ACADEMY OF SCIENCE. 85 



o:in at leniith. codrsely {uhcrcuhir-striate. A'ariable in the color of different 

 plants, colors dingy or sordid, from buff through to reddish-brown and dark 

 <lull red, fading. Flesh white, not changing. Gills white at first, then 

 creamy-yellow to buff-ochraceous, not strongly ochre, broad, distinct. ec{ual, 

 nearly free. Stem white, unchanged, never red, soon cjuite fragile, conic or 

 short-clavate at first, then subequal or ventricose, spongy-stufTed, even. 

 Spores creamy-yellow to pule ochiriceous. Taste mild. Odor none. 



Gregarious. In woods, probably thruout the state. July and August. 

 Not common. 



This species is a sort of clearing house for various colored Russulas with 

 broad, pale ochraceous gills and mild taste, especially reddish forms. I 

 have given Fries' description alcove, supplemented for the most part from 

 notes of my own collections about Stockholm. Romell* describes the cap 

 as "brown, blackish-brown, reddish-brown, dark red, violaceus, yellow or 

 greenish, either unicolorous or with whitish or yellowish spots." I myself, 

 saw only the dirty reddish-ljrown, dark dull red. and sordid-buff forms at 

 Stockholm. In favorable weather or situations, they occur in troops, and 

 seem very common in Sweden. It is a question with me whether we have 

 the Sw^edish species at all. Peck says they are rare in N. Y. state. The 

 Europeans do not agree among themselves as to this species, but there seems 

 to be a fair unanimity that the "dusting" of the gills by the spores is too 

 deceptive for practical use in identification. R. integra is to be separated 

 from R. alutacea by its gills being white at first, by the white fragile stem 

 the paler spores and more striate pileus; under certian conditions these two 

 species are hardly distinguishable. 



Several varieties have been described and, as Fries pointed out long aga„ 

 it would be easy to segregate new species from the mass of plants usually 

 referred here. The collections referred to this species from Michigan do not 

 all look alike in every respect, either in color of pileus nor in shade of spore- 

 color, and in this resj:)ect resemble our acrid species with ochraceous spores. 

 There seems, however, no other i)lace to deposit them, so they are called 

 "forms" of R. integra. They all have reddish, thin, striate caps, fading in 

 color, a separable pellicle and white stem, broad and subdistant gills, and 

 cream to ])ale ochraceous spores ; and the taste is mild, or in some cases slightly 

 astringent or slightly and tardily acrid. The latter forms may be separable 

 when l^etter understood. 



47. RUSSULA PUELLARIS Pk. 



(The youthful Russula.) 



Pileus 2-4 cm. broad, very thin, convex then jjlano-depressed, "vdscid,. 

 tuhercular-striote on the margin, livid-purplish or livid-brownish, then some- 

 times yellowish. Flesh white at first, soon watery subtranslucent, fragile. 

 Gills pallid white to pale yellow, watery honey-colored in age, equal, thin 

 subventricose, narrowed behind and adnexed, interspaces venose. Stem 

 whitish, then watery honey-colored toward base, spongy-stuffed soon cavernous^ 

 soft and fragile, subeciual or subclavate at base, 4-5 cm. long. 7-10 mm. 

 thick. Spores subglobose, ediinulate, pale yellow, 6-8 micr. Taste mild or 

 slightly acrid. Odor none. 



Found in low, moist places in conifer or mixed woods of Europe. It has 

 not yet been reported from Michigan with certainty. I have given Bresa- 

 dola's descri})ti()n as that of a tyi)ical plant, and verified it by notes of the 



*LintIb'.ad's Svampbok: 1. c. 



