class Angiospermae vs flowering shrub

class Angiospermae and flowering shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Angiospermae	Yes	No	No	No
flowering shrub	Yes	No	No	No

class Angiospermae (noun)	flowering shrub (noun)
comprising flowering plants that produce seeds enclosed in an ovary; in some systems considered a class (Angiospermae) and in others a division (Magnoliophyta or Anthophyta)	shrub noted primarily for its flowers