Similar Species
The two-colored bolete has several species that are similar to it and the differences are minute in most cases. Boletus sensibilis differs from the two-colored bolete in that it has an immediate bruising reaction and is poisonous, causing stomach upset if ingested, and in some cases a severe allergic reaction. B. miniato-olivaceus has a full yellow stem and slightly lighter cap coloration. It also has a more immediate bruising reaction than the two-colored bolete and the stem is slightly longer in proportion to the cap. B. peckii differs from the two-colored bolete by having a smaller average size, a rose red cap that turns almost brown with age, flesh that is paler in color, and a bitter taste. B. speciosus differs from the two-colored bolete by having a fully reticulated stem, more brilliant colors, and very narrow cylindrical spores. Boletus rubellus subsp. rubens and the two-colored bolete have been found to have almost no difference between them, and they cannot be distinguished by appearance alone. Boletus bicoloroide is very similar to the two-colored bolete, the major differences between them being B. bicoloroide has only been found in Michigan and has larger spores. B. bicoloroide is also slightly larger than the two-colored bolete, around 1 cm (0.4 in) longer in the stem and 1 cm (0.4 in) in the cap. This species has not been as thoroughly researched as the two-colored bolete, thus macrochemical tests, edibility, distribution range, and the spore print color are all unknown.
Read more about this topic: Boletus Bicolor
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