Cortaderia richardii vs Arundo richardii

Cortaderia richardii and Arundo richardii both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cortaderia richardii	Yes	No	No	No
Arundo richardii	Yes	No	No	No

As nouns, Cortaderia richardii and Arundo richardii are synonyms defined as:

Cortaderia richardii and Arundo richardii: tall grass of New Zealand grown for plumelike flower heads

Other synonyms of Cortaderia richardii include plumed tussock, toe toe, toetoe.

Cortaderia richardii (noun)	Arundo richardii (noun)
tall grass of New Zealand grown for plumelike flower heads	tall grass of New Zealand grown for plumelike flower heads