Icacinicarya nodulifera was a small icacinaceous fruit with an oval, laterally compressed stone. The surviving endocarp looks comparatively plain externally, but its coarse ridged or faceted locule cast suggests that the original wall may have carried more relief than is visible on the weathered fossil. The stone protected a single seed in the same basic way as other drupaceous members of Icacinaceae.

This Species demonstrates why preservation must be separated from biology in the London Clay flora. The modern CT study could confirm its icacinaceous construction, but could not reliably reconstruct every surface or vascular character because pyritisation and abrasion have degraded the material. Its whole-plant habit is likewise unknown. The safest interpretation is therefore a distinct Icacinicarya fruit morphotype rather than an attempt to force it into a living genus.