A fragment of fossilized wood was found near the top of the conglomerate bed beneath An Sgurr, Isle of Eigg. The wood, which is described here, appears to belong to no recorded genus, fossil or modern. It has affinities with several families of flowering plants (angiosperms), notably the Rosaceae. The name Polyactinoxylon subansgurrensis, gen. et sp. nov. is proposed. It appears that this species was part of a mixed culture of woody plants, growing in a possibly temperate climate, during the early Paleocene.