Agaricaceae 



Russuia. when broken becoming red on exposure to the air. Stem I in. thick, 

 persistently solid, equal, pallid when young, at length black. Gills 

 rounded behind, slightly adnexed, thick, distant, unequal, paler, red- 

 dening when touched. Fries.. 



Compact, obese, inodorous, within and without at length wholly black, 

 in which it differs from all others. The flesh becomes red when broken 

 because it is saturated with red juice, although it does not exude milk. 

 Sometimes a very few of the gills are dimidiate. 



Irr woods. Common. June to November. Stevenson. 



Var. albdnigra Krombh. albo, white; negro, to be black. Pileus 

 fleshy, convexo-plane, depressed in the middle, at length funnel-shaped, 

 viscid, whitish, smoky about the margin. Flesh white, turning black 

 when broken. Stem solid, stout, dusky, becoming blackened. Gills 

 decurrent, crowded, unequal, dusky-whitish. In grassy places. 



Spores papillose, 8j, W.G.S.; subglobose, rough, 8-9/u. Massee. 



New York. Our specimens agree with the description in every re- 

 spect, except that the gills are not distant. Peck, 32d Rep. 



Mild when raw, but with a heavy woody taste. 



Cooked it makes a good dish, but does not equal most Russule. 



K. purpuri'na Quel. and Schulz. purple. (Plate XLV#.) Pileus 

 fleshy, margin acute, subglobose, then plane, at length depressed in 

 the center, slightly viscid in very wet weather, not striate, often split, 

 pellicle separable, rosy-pink, paling even to light yellow. Gills crowded 

 in youth, afterward subdistant, white, in age yellowish, reaching the 

 stem, 2-4 lines broad in front, not greatly narrowed behind, almost 

 equal, not forked. Stem spongy, stuffed, very variable, cylindrical, 

 attenuated above and below the middle, rosy-pink becoming paler 

 (rarely white) toward the base, color obscure in age. Flesh fragile, 

 white, reddish under the skin; odor slight, taste mild. Spores white, 

 globose, sometimes sub-elliptical, 4-8/x long, minutely warted. 



Pileus 1.5-2.5 in. across. Stem up to .4 in. thick, 1.2 in. long. 



"This is a beautiful and very distinct species easily known by its red 

 stem, mild taste and white spores." Peck, 426 Rep. N. Y. State Bot. 



R. adus'ta Fr. aduro, to scorch. Pileus pallid or whitish, grayish- 

 sooty, equally fleshy, compact, depressed then somewhat infundibuliform, 

 margin at first inflexed, smooth, then erect, without striae. Flesh 



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