Toadstools, mushrooms, fungi, edible and poisonous; one thousand American fungi

_Peck_, Boleti of the U.S., p. 103. =B. hemichry´sus= B. and C.—half-golden. =Pileus= convex, at length plane or irregularly depressed, floccose-squamulose, covered with a yellow powder, sometimes cracked, bright golden-yellow. =Flesh= thick, _yellow_. =Tubes= adnate or decurrent, yellow, becoming reddish-brown, the mouths large, angular. =Stem= _short, irregular, narrowed below_, sprinkled with a yellow dust, yellowish tinged with red; mycelium yellow. =Spores= oblong, minute, dingy-ochraceous. Var. _muta´bilis_. =Flesh= slightly changing to blue where wounded. =Stem= reddish, yellow within, sometimes eccentric. =Spores= oblong-elliptical, 7.5–9×3–4µ. =Pileus= 1.5–2.5 in. broad. =Stem= about 1 in. long, 3–6 lines thick. Roots of pine, _Pinus palustris_. The variety on stumps of _Pinus strobus_. South Carolina, _Ravenel_; North Carolina, _Curtis_; New York, _Peck_. The species is remarkable for its habitat, which is lignicolous. The New York variety grew on a stump of white pine. By its eccentric stem it connects this genus with Boletinus, through Boletinus porosus. According to the authors of this species it resembles Boletus variegatus. _Peck_, Boleti of the U.S. =B. Ravenel´ii= B. and C.—after Ravenel. =Pileus= convex or nearly plane, _slightly viscid when young or moist_, covered with a sulphur-yellow powdery down, becoming naked and dull-red on the disk. =Flesh= whitish. =Tubes= at first plane, _adnate_, pale-yellow, becoming yellowish-brown or umber, dingy-greenish where bruised, the mouths large or medium size, subrotund. =Stem= nearly equal, clothed and colored like the young pileus, yellow within, with a slight evanescent webby or tomentose ring. =Spores= ochraceous-brown, 10–12×5–6µ. =Pileus= 1–3 in. broad. =Stem= 1.5–4 in. long, 3–6 lines thick. Woods and copses. South Carolina, _Ravenel_; North Carolina, _Curtis_; New York, _Peck_; New England, _Frost_. This is a very distinct and very beautiful species. Mr. Ravenel remarks in his notes that “this plant is not infested by larvæ and preserves more constant characters than any other Boletus with which I am acquainted.” The webby powdered filaments constitute a universal veil which at first covers the whole plant and conceals the young tubes. As the pileus expands this generally disappears from the disk, and, separating between the margin and the stem, a part adheres to each. The flesh is sometimes stained with yellow. The tubes in some instances become convex and slightly depressed around the stem. They are almost white when young, and often exhibit brownish hues where wounded. The plant is sometimes cespitose. I have observed a greenish tint to the freshly shed spores, but it soon disappears. Boletus subchromeus Frost Ms. is this species. _Peck_, Boleti of the U.S. =B. auriflam´meus= B. and C.—flaming yellow. =Pileus= convex, _dry_, powdered, bright golden-yellow. =Flesh= white, unchangeable. =Tubes= plane or convex, _free_, yellow, their broad angular _mouths scarlet_. =Stem= slightly tapering upward, powdered, colored like the pileus. =Spores= 10–12.5×5µ. =Pileus= 8–12 lines broad. =Stem= 1–1.5 in. long. Woods. North Carolina, _Curtis_; New York, _Peck_. This is evidently a rare species and as beautiful as it is rare. The whole plant is bright-yellow except the tube mouths, and is sprinkled with yellow dust or minute yellow branny particles. In the New York specimen the scarlet color is wanting in the marginal tube mouths and the stem is marked with fine subreticulating elevated lines. In other respects it agrees well with the diagnosis of the species. _Peck_, Boleti of the U.S. SUBPRUINOSI—_sub_, _pruina_, hoar frost. =Pileus= glabrous, but more often pruinose. =Tubes= adnate, yellowish. =Stem= equal, even, neither bulbous nor reticulated. The species of this tribe have the pileus neither viscid nor distinctly and permanently tomentose. Typically it is glabrous or merely pruinose, but Fries has admitted into the group one species with a pulverulent, and one with a silky pileus. The species are not sharply distinguished from those of the following tribes, and possibly some have been admitted here which might as well have been placed there. Some of the species are variable in color and their characters are not sufficiently well known. Tubes bright-yellow, golden or subochraceous 1