The Crimson Arboretum was a botanical garden on Raritan IV.
Beverly Crusher took her son Jack to visit the Crimson Arboretum when he was a boy. Jack recalled seeing thousands of flowers there, different yet all connected by underground vines. In 2401, he experienced hallucinations of those vines as a representation of the mental connections being sought by his Borg-modified physiology. (PIC: "Võx")