genus Xanthorroea vs Australian grass tree

genus Xanthorroea and Australian grass tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Xanthorroea	Yes	No	No	No
Australian grass tree	Yes	No	No	No

genus Xanthorroea (noun)	Australian grass tree (noun)
grass trees; sometimes placed in family Xanthorrhoeaceae	any of several Australian evergreen perennials having short thick woody stems crowned by a tuft of grasslike foliage and yielding acaroid resins
	stout Australian shrub with narrow leaves crowded at ends of branches and terminal clusters of white or pink flowers