REE

Rare Earth Elements

Hyperaccumulation threshold: 1,000 µg g⁻¹ ΣREE [ref] Primary

Rare earth element (lanthanides plus Y and Sc) hyperaccumulation is an emerging field led by ferns of the genus Dicranopteris and several Phytolacca species. A formal threshold is still being refined; a working cut-off of 1,000 µg g⁻¹ total REE is used here following the trace-element convention.

8 species recorded in this database; highest cited value 4,278 µg g⁻¹ ΣREE.

		Metal			Region	Uptake	Verify
Blechnopsis orientalis	Blechnaceae	REE Rare Earth Elements	4,278	4.3×	China, Southeast Asia	Facultative	primary
Carya glabra	Juglandaceae	REE Rare Earth Elements	2,300	2.3×	USA (eastern)	Facultative	review
Carya tomentosa	Juglandaceae	REE Rare Earth Elements	1,350	1.4×	USA (eastern)	Facultative	hypothesized
Dicranopteris linearis	Gleicheniaceae	REE Rare Earth Elements	3,358	3.4×	South China, Southeast Asia	Obligate	review
Phytolacca americana	Phytolaccaceae	REE Rare Earth Elements	1,040	1×	North America, naturalised in China	Facultative	hypothesized
Pronephrium simplex	Thelypteridaceae	REE Rare Earth Elements	1,500	1.5×	South China	Facultative	hypothesized
Sticheropsis milnei	Gleicheniaceae	REE Rare Earth Elements	1,290	1.3×	Australasia	Facultative	hypothesized
Sticherus flabellatus	Gleicheniaceae	REE Rare Earth Elements	1,130	1.1×	Australia (eastern)	Facultative	hypothesized