floral leaf vs foliage

floral leaf and foliage both are nouns.

Word	Noun	Adjective	Verb	Adverb
floral leaf	Yes	No	No	No
foliage	Yes	No	No	No

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

floral leaf: a modified leaf that is part of a flower
foliage: the main organ of photosynthesis and transpiration in higher plants

Other hypernyms of floral leaf include leaf, leafage.

floral leaf (noun)	foliage (noun)
a modified leaf that is part of a flower	(architecture) leaf-like architectural ornament
	the main organ of photosynthesis and transpiration in higher plants