_Boletus chrysenteron_
Among the toadstools which tradition would surely brand as poisonous
on account of "bright color" is the common species whose name heads
this paragraph, and which is illustrated in Plate 22, fig. 2. In its
various shapes it suggests the preceding varieties. Its cap, however,
is brownish red, often bright _brick red_. _Flesh almost lemon-yellow_,
stained _red just beneath_ the cuticle, and _not noticeably changeable_
on fracture. _Tube surface yellowish green_, turning blue or bluish
green when bruised. Spores light brown. _Tubes_ rather _large_,
angular, and _unequal in shape of aperture_. Stem yellow, often
brightly colored with the red of the cap. Chance cracks in its surface
become red, whence the common name of the "Red-cracked Boletus." A
species frequent in woods throughout the summer and autumn, and edible.
In its brightly colored cap it might possibly be superficially
confounded with the suspicious _Boletus alveolatus_ of Plate 24. But
the latter species is easily distinguished by its rose-colored spores
and red pore surface.