Halesia monticola
 Halesia monticola or mountain silverbell was originally included in H. carolina but was identified first as a subspecies by Rehder in 1914 then as a species by Sargent in 1921. Today some authoritative sources regard this only as a subspecies while other authoritative sources regard it as a species as it is being treated here.H. monticola is much larger than the little silverbell and is the largest member of the genus. It is known to grow 24 meters tall in the Great Smoky Mountains.