Sui generis
A similar case that led to the use of the label "sui generis" is the relationship of New Caledonia relative to France, because the legal status of New Caledonia can aptly be said to lie somewhere between a French overseas collectivity and a sovereign nation. Although other examples of such status for other dependent or disputed territories may exist, this arrangement is unique within the French realm.
Leucosidea
The genus name "Leucosidea" is a form of the Greek word "λευκός" ("leukos"), meaning "shining white", although in botany the root is more often used less specifically to indicate something of a generally white or gray appearance. The second or specific name "sericea" means "silky" and comes from "σηρικός" ("serikos"), which means both "silky" and "from the land of silk"; it refers to the silky hairs that cover the new buds and young leaves of the tree.