Flower Princess was a fantasy Barbie-size doll line made by Creata in the mid-80’s.
Click images to enlarge.
Rainbow the Unicorn:
Galaxy the Winged Horse (Pegasus):
Fairytale Carriage with Regent the horse:
Laurelle (tiered dress, flower choker):
Laurelle (puffed sleeves, ribbons, crown, plastic necklace):