Season: Summer and autumn.

PLATE XXII

Boletus Subtomentosus.   B. CHRYSENTERON

Caution advisable

Another species having this peculiar property of "turning blue" even in a more marked degree, and named, in consequence, the B. cyanescens, though always heretofore considered poisonous, is now pronounced by certain prominent mycophagists to be not only harmless but esculent. It is still advisable, however, to caution moderation in its use as food, if only on the ground of idiosyncrasy. The spores of this species are white, which, with the more minute tube openings, form a sufficient discrimination from subtomentosus. The spores should be obtained by a deposit on black or dark-colored paper. The flesh is white also. Other blue-stain species, such as B. alveolatus ([Plate 24]), are still considered with suspicion, presumably groundless.

YELLOW-FLESHED BOLETUS

Boletus chrysenteron