See text Weltrichia is a genus belonging to the extinct seed plant group Bennettitales.

Both the cup and rays usually (but not always) have substantial thickness, in some of the thicker species the structure is noticeably woody.

The rays also sometimes have ridges, trichomes, appendages, striae and/or unipinnate (pedicellate) pollen sacs present.

They were borne by the same plants that also bore female ovulate cones assigned to Williamsonia.

At least some bearers of Weltrichia, such as Kimuriella from the Late Jurassic of Japan were low growing divaricately branching shrubs with a maximum height of 2–3 metres, while others such as Williamsonia gigas may have been more cycad-like in morphology.