dandelion green vs foliage

dandelion green and foliage both are nouns.

Word	Noun	Adjective	Verb	Adverb
dandelion green	Yes	No	No	No
foliage	Yes	No	No	No

As nouns, foliage is a hypernym of dandelion green; that is, foliage is a word with a broader meaning than dandelion green:

dandelion green: the foliage of the dandelion plant
foliage: the main organ of photosynthesis and transpiration in higher plants

Other hypernyms of dandelion green include leaf, leafage.

dandelion green (noun)	foliage (noun)
edible leaves of the common dandelion collected from the wild; used in salads and in making wine	(architecture) leaf-like architectural ornament
the foliage of the dandelion plant	the main organ of photosynthesis and transpiration in higher plants