Sui generis
In local government, a "sui generis" entity is one that does not fit with the general scheme of local governance of a country. For example in England, the City of London and the Isles of Scilly are the two "sui generis" localities, as their forms of local government are both (for historical or geographical reasons) very different from those of elsewhere in the country. 
In a press conference during which reporters were trying to analyse his political personality, Huey Long said, "...say that I am "sui generus", and let it go at that."
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.