Radiola linoides is the sole species in the Radiola genus, a monotypic genus of flowering plants belonging to the family Linaceae. It has the common names of 'allseed' and 'flaxseed'. It has a very short stem which is repeatedly subdivided, with a pair of very small leaves and a single white flower at each fork and at the end of the branches. It has leaves which are opposite arranged, oval and sessile.