boulder fern vs Dennstaedtia punctilobula

boulder fern and Dennstaedtia punctilobula both are nouns.

Word	Noun	Adjective	Verb	Adverb
boulder fern	Yes	No	No	No
Dennstaedtia punctilobula	Yes	No	No	No

As nouns, boulder fern and Dennstaedtia punctilobula are synonyms defined as:

boulder fern and Dennstaedtia punctilobula: fern of eastern North America with pale green fronds and an aroma like hay

Other synonyms of boulder fern include hay-scented, hay-scented fern, scented fern.

boulder fern (noun)	Dennstaedtia punctilobula (noun)
fern of eastern North America with pale green fronds and an aroma like hay	fern of eastern North America with pale green fronds and an aroma like hay