Taxon Details: Boletus amygdalinus Thiers
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Narratives:
Family:
Boletaceae (Basidiomycota)
Boletaceae (Basidiomycota)
Scientific Name:
Boletus amygdalinus Thiers
Boletus amygdalinus Thiers
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Description: Pileus 6-10 cm broad at maturity, convex when young, becoming plano-convex to plane with age, often highly irregular or undulating; surface dry, matted tomentose to cottony fibrillose to appressed fibrillose, usually not appearing fibrillose scaly or rimose; typically colored dark rose to red ("ocher red" to "Etruscan red" to "Corinthian pink") when young, unchanging or changing to dark brownish red ("brownish vinaceous" to "light russet-vinaceous" to "russet" to "vinaceous-russet" to "terra cotta") on the disc when older, sometimes changing to reddish brown ("vinaceous-brown" to "sorghum brown") toward the margin; margin incurved becoming decurved, entire. Context 1-2 cm thick, yellow ("naphthalene yellow" to "amber yellow"), bluing immediately upon exposure. Taste and odor not distinctive.
Observations: This species was originally described as Boletus puniceus; however, that name had been previously applied to a species from China, thereby necessitating the adoption of a new epithet. Boletus amygdalinus shows obvious affinities with B. erythropus, but is readily distinguished by the much paler colors of its pileus and tubes. Even old basidiocarps fail to show the dark-brown color of the pileus or the dark-red pores usually associated with B. erythropus. Boletus amygdalinus also has larger, more ellipsoid spores, larger cystidia, no laticifers in the pileus trama, and a different type of cuticle on the stipe. The probable mycorrhizal hosts for the two species are also different. Other red-pored boletes occurring in the state are readily distinguished either by the color of the pileus, reticulate stipe, or a combination of these and other characters.
Description: Pileus 6-10 cm broad at maturity, convex when young, becoming plano-convex to plane with age, often highly irregular or undulating; surface dry, matted tomentose to cottony fibrillose to appressed fibrillose, usually not appearing fibrillose scaly or rimose; typically colored dark rose to red ("ocher red" to "Etruscan red" to "Corinthian pink") when young, unchanging or changing to dark brownish red ("brownish vinaceous" to "light russet-vinaceous" to "russet" to "vinaceous-russet" to "terra cotta") on the disc when older, sometimes changing to reddish brown ("vinaceous-brown" to "sorghum brown") toward the margin; margin incurved becoming decurved, entire. Context 1-2 cm thick, yellow ("naphthalene yellow" to "amber yellow"), bluing immediately upon exposure. Taste and odor not distinctive.
Observations: This species was originally described as Boletus puniceus; however, that name had been previously applied to a species from China, thereby necessitating the adoption of a new epithet. Boletus amygdalinus shows obvious affinities with B. erythropus, but is readily distinguished by the much paler colors of its pileus and tubes. Even old basidiocarps fail to show the dark-brown color of the pileus or the dark-red pores usually associated with B. erythropus. Boletus amygdalinus also has larger, more ellipsoid spores, larger cystidia, no laticifers in the pileus trama, and a different type of cuticle on the stipe. The probable mycorrhizal hosts for the two species are also different. Other red-pored boletes occurring in the state are readily distinguished either by the color of the pileus, reticulate stipe, or a combination of these and other characters.