 The spores are oval to ellipsoid in shape , smooth , hyaline ( translucent ) , and measure 7 – 11 by 3 @.@ 5 – 5 μm . The basidia are club @-@ shaped , four @-@ spored , and measure 15 – 24 by 6 – 7 @.@ 5 μm . Pleurocystidia ( cystidia found on the tube faces ) are irregularly club @-@ shaped , with dimensions of 20 – 36 by 7 – 10 μm , while cheilocystidia ( found on the tube edge ) are club @-@ shaped , rare , occur singly , and measure 18 – 32 by 7 – 9 μm . Although rare , there are also caulocystidia ( occurring on the stem ) that are arranged in groups , and which measure individually 24 – 30 by 6 – 9 μm . Clamp connections are absent from the hyphae of T. alboater . 
