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Family: BoletaceaeFamily: Boletus
Cap: 50-150mm, hemispherical later persistently convex, whitish grey, silvery grey, grey-brown to milky coffee colour to light brown, at times with delicate tints of pinkish-grey or coral throughout or only near margin, bruising more brownish or rusty tawny. Stem: 50-150 x 20-60mm, cylindrical to clavate, base rounded rarely rooting, lemon-chrome to dark lemon-yellow at apex, pale lemon-yellow, with a fairly distinct pale blood-red zone midway, becoming dirty brownish to clay-buff, covered with a fine yellowish reticulation more strongly near the top. Tubes: lemon-yellow then greenish yellow, bluish-green when cut. Pores: lemon-yellow to lemon-chrome, later dirty yellow, bluish green when bruised. Flesh: light yellow, firm when young, soft with age, becoming intensely blue on cutting, most strongly over tubes, less at base of stem. Taste: sweet. Smell: slightly of disinfectant or like Scleroderma (earthballs). Spore print: olivaceous brown. Spores: 11.4-13.9(-15) x 4.7-6.8µm subfusiform or elongate-ellipsoid in side-view, ellipsoid in face-view, pale straw-colour in Ammonia, hardly darker in Melzer's Iodine. Basidia: mostly 4-spored.