 The irregularly shaped spores measure from 7 @.@ 2 to 11 @.@ 6 by 5 @.@ 1 to 7 @.@ 9 micrometres ( μm ) , each featuring a few thick protusions . Abnormal spores of a different shape , sometimes with protrusions more distinct from the actual spore than is typical , can sometimes form ; this is perhaps due to poor weather . The club @-@ shaped basidia measure 25 to 40 by 9 to 14 μm , and each basidium bears four spores . The yellowish pleurocystidia ( cystidia on the face of the gill ) are ventricose or occasionally club @-@ shaped , measuring 41 to 89 by 12 to 23 μm , including a cell wall up to 4 @.@ 5 μm thick . The tip often bends and is encrusted with crystal @-@ like structures , while the base tapers , or narrows into a small stalk . The cheilocystidia ( cystidia on the edge of the gill ) are much the same , but they are typically somewhat shorter and stouter . The longer caulocystidia ( cystidia on the stem ) occur all the way down the stem and measure up to 99 μm in length with a more variable shape . The mushrooms also feature " paracystidia " , club @-@ shaped cystidia @-@ like structures on the gills lacking crystals , as well as " cauloparacystidia " on the stem . In Inocybe saliceticola , the paracystidia are fairly abundant , with thin cell @-@ walls , while the abundant cauloparacystidia can have slightly thicker walls and are often arranged in clusters . 
