Amaranth

12 clues
Showy flower
Undying flower
Unfading flower
Ornamental plant
Flower sacred to Artemis
Imaginary eternal flower
Imaginary, undying flower
Love-lies-bleeding, for one
Unfading" flower eaten by Aztecs
Immortal" flower in "Paradise Lost
Flower that symbolizes immortality
Long-lasting flowering plant often mentioned in poetry