button fern vs Pellaea rotundifolia

button fern and Pellaea rotundifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
button fern	Yes	No	No	No
Pellaea rotundifolia	Yes	No	No	No

As nouns, button fern and Pellaea rotundifolia are synonyms defined as:

button fern and Pellaea rotundifolia: fern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets

button fern (noun)	Pellaea rotundifolia (noun)
Jamaican fern having round buttonlike bulbils	fern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets
fern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets