Cunningham's Encyclopedia of Magical Herbs - Scott Cunningham 1985
Plum, Wild
The Herbs

(Prunus americana) Seed and wilted leaf: X
Gender: Feminine
Planet: Venus
Element: Water
Powers: Healing
Magical Uses: The Dakota Indians of North America used wild plum sprouts in fashioning prayer sticks. The sprouts were peeled and painted and an offering (usually a small amount of tobacco) was fastened near the top of the stick. These were made for sick persons and were set up around the altar or stuck into the ground outside for the gods.
This same idea can be adapted by anyone with a little imagination.