Pennisetum setaceum vs Pennisetum ruppelii

Pennisetum setaceum and Pennisetum ruppelii both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pennisetum setaceum	Yes	No	No	No
Pennisetum ruppelii	Yes	No	No	No

As nouns, Pennisetum setaceum and Pennisetum ruppelii are synonyms defined as:

Pennisetum setaceum and Pennisetum ruppelii: tall perennial ornamental grass with long nodding flower plumes of tropical Africa and Asia

Other synonyms of Pennisetum setaceum include fountain grass.

Pennisetum setaceum (noun)	Pennisetum ruppelii (noun)
tall perennial ornamental grass with long nodding flower plumes of tropical Africa and Asia	tall perennial ornamental grass with long nodding flower plumes of tropical Africa and Asia