Plagianthus regius vs Plagianthus betulinus

Plagianthus regius and Plagianthus betulinus both are nouns.

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

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

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

Other synonyms of Plagianthus regius include ribbon tree, ribbonwood.

Plagianthus regius (noun)	Plagianthus betulinus (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