common purslane vs genus Portulaca

common purslane and genus Portulaca both are nouns.

Word	Noun	Adjective	Verb	Adverb
common purslane	Yes	No	No	No
genus Portulaca	Yes	No	No	No

common purslane (noun)	genus Portulaca (noun)
weedy trailing mat-forming herb with bright yellow flowers cultivated for its edible mildly acid leaves eaten raw or cooked especially in Indian and Greek and Middle Eastern cuisine; cosmopolitan	genus of mainly tropical fleshy or trailing herbs