autumnal vs autumn-flowering

autumnal and autumn-flowering both are adjectives.

Word	Noun	Adjective	Verb	Adverb
autumnal	No	Yes	No	No
autumn-flowering	No	Yes	No	No

autumnal (adjective)	autumn-flowering (adjective)
of or characteristic of or occurring in autumn	of plants that bloom during the autumn
characteristic of late maturity verging on decline