GO 
I. COMPACTS. 
1. “R. nigricans, (Ball.) Fr.,Hym. Eur.,p. 439; Gke. Ill, 1015; Stev., 
B.F., p. 114; Sacc., Syll., p. 453. Pileus 2-4 inches (5-10 centimeters) 
and more broad, olivaceous-fuliginous, at length black , fleshy to the mar 
gin which is at first bent inwards, convex, then flattened, umbilicato- 
depressed, when young and moist slightly viscid and even (without a 
separable pellicle), at length rimose-squamulose; flesh firm, white, when 
broken becoming red on exposure to the air. Stem 1 inch (2.5 centi¬ 
meters) thick, persistently solid, equal, pallid when young, at length 
black. Gills rounded behind, slightly annexed, thick , distant , unequal, 
paler, reddening when touched. 
“ 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. In woods. Common. 
June-Noveinber. Spores papillose, 8/n W. G. S. Coarse in habit. 
Name— nigrico , to be blackish. (Fr., Monogr., ii, p. 184 ; Berk. Out., 
p. 209 ; C. Hbk.,n. 013 ; S. Mycol. Scot., n. 5N3; Hussey, i, t. 73 ; Ag. 
Bull., t. 579. f. 2, t. 212; Krombh., t. 70, f. 14, 15 ; Barla,t. 17; Sow., t. 
30,)”—Stevenson. 
Taste disagreeable. Massachusetts,* Frost; Minnesota, common, 
July and August, Johnson; New York, our specimens agree with the 
description in every respect, except that the gills are not distant, Au¬ 
gust and September, Peck, thirty-second reportj New Jersey, Ellis. 
2. “R. ADUSTA, (Pers.) Fr., Hym. Eur., p. 439; Stev., B. F., p. 114; 
Sacc., Syll., p. 454. Pileus pallid or whitish, cinereous-fuliginous, equally 
fleshy, compact, depressed then somewhat infundibuliform, margin at 
first inflexed, smooth, then erect, without stria?; flesh unchangeable. 
Stem solid, obese, of the same color as the pileus. Gills adnate, then 
decurrent, thin , crowded , unequal, white, then dingy, not reddening when 
touched. 
“ It can only be compared with R. nigricans , but is sufficiently distinct; 
stature commonly smaller, flesh juiceless, not reddening, etc. The 
pileus does uot become black, but only of a scorched appearance. In 
woods. Frequent. August to October. ‘Well distinguished by its 
thin, crowded gills,’ etc. M. J. B. ‘Spores splneroid, echinulate, 7-9 ji, 
globose, rough, 8.’ C. B. P. Name— aduro, to scorch, from its scorched 
appearance. (Fr., Monogr., ii, p. 184 ; Berk. Out., p. 209 ; C. Hbk., u. 
014; S. Mycol. Scot., n. 583; Ag., Pers. Krombh., t. 70, f. 7-11; Batt., 
t. 13.)”—Stevenson. 
North Carolina and Pennsylvania, Schweiuitz ; North Carolina, woods 
and thickets, Curtis; Massachusetts, Frost; Minnesota, September and 
October, Johnson ; California, Harkness and Moore ; Nova Scotia, pine 
woods, September, Somers, R. J. Bennett. 
* These references are placed with regard to the order of their dates. 
