Truncocolumella is a genus of fungi in the family Suillaceae, of the order Boletales. It was circumscribed by American mycologist Sanford Myron Zeller in 1939. One field guide lists the potato-like Truncocolumella citrina as edible. • To determine the odour of Truncocolumella citrina mature fruiting bodies of were extracted in diethyl ether and analyzed by gas chromatography-mass spectroscopy (GC-MS). The two major odor compounds that were identified are hexanoic acid and phenylacetaldehyde. These compounds were not found on examination of immature fruiting bodies.