Petasites vulgaris vs bog rhubarb

Petasites vulgaris and bog rhubarb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petasites vulgaris	Yes	No	No	No
bog rhubarb	Yes	No	No	No

As nouns, Petasites vulgaris and bog rhubarb are synonyms defined as:

Petasites vulgaris and bog rhubarb: small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas

Other synonyms of Petasites vulgaris include butterbur, Petasites hybridus.

Petasites vulgaris (noun)	bog rhubarb (noun)
small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas	small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas