Owing to its increasing scarcity , U. changii was added to the Hainan Province Protected Plants List in 2006 .
Owing to its increasing scarcity , U. changii was classed as ' Vulnerable ' by the International Union for the Conservation of Nature ( IUCN ) .
Owing to its increasing scarcity , U. changii was added to the Hainan Province Protected Plants List in 2006 , and classed as ' Vulnerable ' by the International Union for the Conservation of Nature ( IUCN ) .