This feature relates to the overall shape of pileocystidia, in side view, irrespective of the shape of the apex (Pileocystidia apex shape) and any branching (Pileocystidia branched). The different shape states are simply based on where the widest point is, and the length/width ratio.

If the shape is described with modifiers such as 'narrowly' clavate or 'broadly' clavate, choose the state being modified (in this example, clavate). However, if the shape is described as 'slightly' clavate or 'subclavate', chose the state that otherwise matches (which will usually be cylindrical).

More than one shape can be present.

Choose this state if: the cystidia are more or less the same diameter throughout their length. Another term for this state is filiform (when the cystidium is very narrow).

Cylindrical cystidia can be bent (flexuose or sinuous) or with constrictions (strangulate or moniliform).