Endangered Hoodoo Plants

While looking for a piece of information I needed, I came across this page, which mostly is a promotional piece for the book Sticks, Stones, Roots and Bones; but which contains this interesting piece of info:

The United Plant Savers is an important group that keeps herbalists, gardeners, and others informed of the fragile status of certain plants. It is important to realize that today many traditional Hoodoo plants are at risk and some are in danger of extinction, including:

Bearberry (Arctostaphylos uva-ursi), also called kinnickinnick
Black cohosh (Cimicifuga racemosa)
Blood root (Sanguinaria Canadensis), also called King root or He root
Blue Cohosh (Caulophyllum thalictroides)
Cascara Sagrada (Frangula purshiana), also called sacred bark
Goldenseal (Hydrastic canadensis); ginger is a safe substitute
Solomon Seal (Polygonatum biflorum)
Trillium (Trillium spp.), Indian Root and Beth Root
White Oak Bark (Quercus alba)
White Sage (Salvia apiana), used widely in smudge sticks
While I haven't any partocular ideas, at the moment, as to what anyone might really be able to do about this, I figured -- why not give everyone something new to fret and worry on? Still, I'd hate to find Solomon's Seal and Dixie John go the way of Adam and Eve roots and just become virtually impossible to find. For what it's worth, I guess.