Cunningham's Encyclopedia of Magical Herbs - Scott Cunningham 1985

Edelweiss
The Herbs

(Leontopodium alpinum)

Powers: Invisibility, Bullet-Proofing

Magical Uses: Made into a wreath and worn, edelweiss confers invisibility.

To be protected against daggers and bullets, pull up a whole edelweiss by its roots during the day on a Friday of the Full Moon. Wear it wrapped in white linen.

Edelweiss also grants your heart’s desire; you need only grow and care for the plant.