Art-'Natural forms' artists?

Question

does anyone know of any artists who base their work on/take inspiration from 'natural forms', so i could look at their work and stuff for my gcse coursework

(natural forms is stuff like rocks and trees, but not animals)

thanks in advance :]

Answer 1

what about agenore fabbri

http://www.scultura-italiana.com/Biograf...

Answer 2

Georgia O'Keeffe