Plagianthus betulinus vs Plagianthus regius

Plagianthus betulinus and Plagianthus regius both are nouns.

Word	Noun	Adjective	Verb	Adverb
Plagianthus betulinus	Yes	No	No	No
Plagianthus regius	Yes	No	No	No

As nouns, Plagianthus betulinus and Plagianthus regius are synonyms defined as:

Plagianthus betulinus and Plagianthus regius: deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton

Other synonyms of Plagianthus betulinus include ribbon tree, ribbonwood.

Plagianthus betulinus (noun)	Plagianthus regius (noun)
deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton	deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton