This is pattern #65 in the book “100 Lace Flowers to Crochet.” Instructions on page 83. Featured on page 35 of the Showcase.

Finished length: 2-3/4 inches (70 mm)
Thread required: 5 yards (4.6 m)

All pattern samples in this book are made with size 10 thread and a size 5 (1.9mm) crochet hook.