162 THE AGARICACEAE OF MICHIGAN 



to buff-ochraceous, not strongly ochre, 'broad, distinct, equal, nearly- 

 free. STEM white, unchanged, never red, soon quite fragile, conic 

 or short-clavate at first, then subequal or veutricose, spougy-stuiled, 

 even. SPORES creamy-yellow to pale ochraceous. TASTE mild. 

 ODOR none. 



Gregarious. In woods, probably throughout the state. Ann 

 Arbor. 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, es- 

 pecially reddish forms. I have given Fries' description above, 

 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, violaceous, yellow or greenish, 

 either unicolorous or with whitish or yellowish spots." I saw only 

 the dirty reddish-brown, dark dull red and sordid-buff forms at 

 Stockholm. In favorable weather or situations they occur in troops 

 and seem verv common in Sweden. Peck says thev are rare in 

 'New York state. The European mycologists 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 

 ^\ alutacea by its gills being white at first, by the white fragile 

 stem, the paler spores and more striate pileus ; under certain condi- 

 tions these two species are hardly distinguishable. 



The two plates of Cooke referred to, give the best idea of the 

 species as here limited. The figures of this species with bright red 

 caps, shown by various authors, illustrate segregated species for jthe 

 most part. Maire (Soc. Myc. Bull. 2G, 1910) has named one form, 

 R. 7-omeUi, and considers another to be 7?. melliolens Quel. As 

 Fries pointed out long ago, it is easy to separate new species from 

 the mass of plants usually referred here, and the more exact method 

 with the microscope will doubtless produce many more. I have 

 found this species rarely but then in quantity, as they usually cover 

 quite an area from the same mycelium. 



145. Russula amygdaloides sp. nov. (Edible) 

 (See under 7?. harlae Quel., Mich. Acad. Sci. Rep. 13, p. 221, 1911.) 



PILEUS 4-8 cm. broad, thin, medium size, ovate at first with 

 straight margin, then convex-plane or depressed, very viscid, fragile, 

 pale rosy-flesh color fiwicd icifh yelJoic, sometimes peach color, 

 sometimes dull citron-yellow, varying in color from young to old. 



