The rare plant purple gromwell is found at the site. Notable plants include the goldilocks buttercup, field gromwell and Venus's looking-glass. The nationally rare purple gromwell ("Lithospermum purpurocaeruleum") occurs at Rose Wood. In ancient China, purple was obtained not through the Mediterranean mollusc, but purple gromwell. In China, purple root/gromwell ("Lithospermum purpurocaeruleum") has been used to produce a purple dye. Purple gromwell ("Lithospermum purpurocaeruleum"), a nationally rare plant, also grows in the wood.