TOPIC: 25 kg Star Grass root, 5 to 60 kg Indian Hemp root

I am looking for a reliable supplier of dried herbs & roots, for example right now:

5 to 60 kg Indian Hemp root (Apocynum cannabinum)
25 kg Dogbane root (Apocynum androsaemifolium)
25 kg Star Grass root (Aletris farinosa)
20 kg Wintergreen leaves (Gaultheria procumbens)
10 kg Yellow Pond Lily (Nuphar lutea)
and many more. pls contact me and send me a list of herbs & quantities you can collect and offer on a regular annual basis.

What good is dogbane root ? Apocynum. I thought this plant was mildly toxic and had no medicinal value. Am I missing something ?