ladies' tobacco vs lady's tobacco

ladies' tobacco and lady's tobacco both are nouns.

Word	Noun	Adjective	Verb	Adverb
ladies' tobacco	Yes	No	No	No
lady's tobacco	Yes	No	No	No

As nouns, ladies' tobacco and lady's tobacco are synonyms defined as:

ladies' tobacco and lady's tobacco: North American perennial propagated by means of runners

Other synonyms of ladies' tobacco include Antennaria plantaginifolia.

ladies' tobacco (noun)	lady's tobacco (noun)
North American perennial propagated by means of runners	North American perennial propagated by means of runners