Published Indigenous plant teachings
Read teachings as relationships among a particular people, language, plant, and homeland. Name the Nation and teacher. A published book can invite learning without granting permission to reproduce ceremony, claim identity, commercialize knowledge, or transplant a regional rule everywhere.
Your own ancestral and local lines
Go deeper where you have an actual relationship: family gardeners, elders, herbalists, cultural centers, tribal or First Nations publications, local language names, and repeated visits to one patch through a full year.
A personal practice
You may create private prayers, offerings, and correspondences. Call them personal rather than ancient or Indigenous unless you can name the source and have the standing to carry it forward.