Figure 230.—Flammula carbonaria.
Carbonaria is so called because it is found on charcoal or burned earth.
The pileus is quite fleshy, tawny-yellow, at first convex, then becoming plane, even, thin, viscid, margin of the cap at first inrolled, flesh yellow.
The gills are firmly attached to the stem, clay-colored or brown, moderately close.
The stem is stuffed or nearly hollow, slender, rigid, squamulose, pallid, quite short.
The spores are ferruginous-brown, elliptical, 7×3.5µ.
I have found this species quite frequently where an old stump had been burned out. It is gregarious. I have only found it from September to November but the specimens in Figure 230 were sent to me in May, from Boston. They were found in great abundance in Purgatory Swamp, where the grass and vegetation had been burned away.