flowering glume vs lemma

flowering glume and lemma both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowering glume	Yes	No	No	No
lemma	Yes	No	No	No

As nouns, flowering glume and lemma are synonyms defined as:

flowering glume and lemma: the lower and stouter of the two glumes immediately enclosing the floret in most Gramineae

flowering glume (noun)	lemma (noun)
the lower and stouter of the two glumes immediately enclosing the floret in most Gramineae	a subsidiary proposition that is assumed to be true in order to prove another proposition
	the heading that indicates the subject of an annotation or a literary composition or a dictionary entry
	the lower and stouter of the two glumes immediately enclosing the floret in most Gramineae