– bogus bolete, gastroid bolete
Description: The genus Gastroboletus is used for secotioid fungi that are similar to species of Boletus. Usually a cap is present and typically it is rounded or flattened with the margin turned down. However, in G. ruber (Zeller) Cázares & Trappe (= Truncocolumella rubra Zeller), the cap is so reduced that it looks like a false truffle without a complete peridium. In most Gastroboletus species the tubes are elongated, curved or contorted, and often olive to brown. The stipe is usually short and stout or sometimes forms a columella. G. turbinatus is our most common species, occurring from spring through fall. At first glance, the fruitbody looks like a bolete, such as Boletus chrysenteron---the cap is velvety and brown with yellowish and reddish areas, the stipe is rather short, pointed below, yellowish with small reddish scales and granules, and the pores are rather large, reddish and stain blue. The tubes are long, curved, yellow to greenish yellow and clearly indicate its secotioid nature. The flesh is yellowish, with some red just below the cap cuticle, and the whole interior stains blue after cutting.