8 September 2020 Surrey. Photograph copyright Leif Goodwin. Synonymns Boletus spadiceus, Boletus citrinovirens, Xerocomus subtomentosus var. ferrugineus Cap Convex, velvety, brown, olive brown or reddish brown, less commonly olive green, margin overhanging, to about 10 cm across Pores Large, irregular, lemon yellow when young, becoming greenish yellow with age, reddish at the margin Stem Cylindrical to club shaped, often cracking and the flesh curling back, pale yellow to pale brown, decorated with small rusty spots, sometimes with a coarse network, yellow mycelium visible at the base Flesh Firm, whitish to pale yellow in the cap, tinged pinkish in the stem Smell Pleasant Taste Mild Season Late summer to autumn Distribution Infrequent Habitat In coniferous and mixed woods Spore Print Olive green to brown Microscopic Features Spores spindle shaped, smooth (10-16) x (4-6) µm2 Edibility Edible, mediocre Notes A drop of KOH turns the cap deep red, and the flesh and stem surface orange. A drop of ammonia solution on the cap surface flashes green blue, and then slowly reddish brown. This species is easily confused with Xerocomus subtomentosus and Xerocomus chrysonemus. 
8 September 2020 Surrey. Photograph copyright Leif Goodwin. 
Spores in Melzer's solution viewed with a x100 immersion objective. 8 September 2020 Surrey. Photograph copyright Leif Goodwin. |