The Empress, Lady Day: In a Rainbow Garden, with Yellow-Gold Hot Springs, Surrounded by Exotic Plants and Flowers by Wadada Leo Smith. Don’t panic, I copied and pasted the title.
I knew the name, but not the music. This cropped up on France Musique la Jazz just now as I was sitting outside enjoying one of the last summer nights. I see it comes from a highly regarded album - further investigation is obviously necessary.