microflora vs flora

microflora and flora both are nouns.

Word	Noun	Adjective	Verb	Adverb
microflora	Yes	No	No	No
flora	Yes	No	No	No

As nouns, flora is a hypernym of microflora; that is, flora is a word with a broader meaning than microflora:

microflora: microscopic plants; bacteria are often considered to be microflora
flora: (botany) a living organism lacking the power of locomotion

Other hypernyms of microflora include plant, plant life, micro-organism, microorganism.

microflora (noun)	flora (noun)
microscopic plants; bacteria are often considered to be microflora	(botany) a living organism lacking the power of locomotion
	all the plant life in a particular region or period