Waretown, N.J. Under pines and open places in pine woods. August to September, 1889. _McIlvaine._ When wet the caps become darker and have a mottled appearance. They are tender, but rather tasteless. The species serves to make quantity when cooked with others of higher flavor. =T. pipera´tum= Pk.—_piper_, pepper. =Pileus= rather thin, firm, dry, convex, obtuse or subumbonate, virgate with innate brownish fibrils, varying in color from grayish-brown to blackish-brown, sometimes with greenish or yellowish tints. =Flesh= white or whitish, taste acrid. =Gills= broad, close, rounded behind, adnexed, whitish or yellowish. =Stem= generally short, equal, solid, silky, slightly mealy or pruinose at the top, white or slightly tinged with yellow. =Spores= elliptic, 6–7µ long, 5µ broad. =Pileus= 4–7 cm. broad. =Stem= 5–7 cm. long, 6–12 mm. thick. The central part of the pileus is sometimes a little darker than the rest. The peppery or acrid taste is very distinct and remains in the mouth many minutes. This and the innately fibrillose character of the pileus are distinguishing characters of the species. The plants appear from September to November. _Peck_, Torr. Bull., Vol. 26. Mt. Gretna, Pa. October to November, 1898, on damp ground among moss. _McIlvaine._ =Cap= up to 3 in. across, bell-shaped, then convex, depressed in center and undulate, light-brown, darker toward center, dry, minutely fibrillose. =Flesh= thick, white, thin toward margin. =Gills= emarginate, unequal, not forked. =Stem= 1½-2 in. long, hard, equal or enlarging toward base, white, silky, striate. Though peppery raw, this Tricholoma is of good substance and flavor when cooked. _B._ PILEUS EVEN, SMOOTH, NOT DOWNY, SCALY, NOR VISCID, ETC. V.—GUTTA´TA. Pileus marked with drop-like spots or rivulose. * _Gills whitish._ =T. gambo´sum= Fr.—_gambosus_, swelling near the hoof. =Pileus= 3–4 in. and more broad, _becoming pale-tan_, fleshy, _hemispherico-convex, then flattened_, obtuse, undulated and bent backward, even, smooth, but _spotted as with drops_, at length widely cracked (not, however, torn into squamules), the _margin at the first involute and tomentose_. =Flesh= thick, soft, fragile, white. =Stem= 2 in. and more long, ½-1 in. thick, _solid_, fleshy-firm, almost _equal_, often curved-ascending at the base, _white_, _downy at the apex_. =Gills= rounded or emarginato-adnexed, with a somewhat decurrent tooth and when old sinuato-decurrent, _crowded_, ventricose, 2–3 lines broad, _whitish_. _Fries._ _Odor_ pleasant, _of new meal_. Often forming large rings or clusters. A whitish form must not be confounded with T. albellus. =Spores= 13×11µ _W.G.S._; 13–14×8–9µ _Massee_; 13×10µ _Cooke_. Angora, Philadelphia. Chester and Lebanon county, Pa. _McIlvaine._ Fair. ** _Gills becoming reddish or smoky-gray._