Thanks for the critique Mr_Lamppost. I thought that was weird too, and in order to compensate, I had made all of the branches tan colored. But the problem was still there, albeit to a lesser degree. Right now, I have:
Reflectivity = 1 with white (R255 G255 B255)
Reflection tint = .8046 tan (R231 G225 B188)
I am adding a zillion more smaller weeds today, so I will play with these two params per your suggestion.
Thank you.
treddie