Sentence:  With ſolemn adoration down they [the angels] caſt / Thir Crowns inwove with <WSD>Amarant</WSD> and Gold; / Immortal <WSD>Amarant</WSD>, a Flour which once / In Paradiſe, faſt by the Tree of Life / Began to bloom, but ſoon for mans offence / To Heav'n remov'd where firſt it grew, there grows, / And flours aloft ſhading the Fount of Life, [...] 
Meaning of the word marked with <WSD> tags:  An imaginary flower that does not wither.