Initial Sketches

I tried to combine all the things you liked from the two paintings and add in all the plants, let me know if something is missing. 

First ideas

First ideas

Colors to block in shapes

Little more refined

Map of Plants and Features

1. Line of Oaks
2. Mesquite Trees
3. Prickly Pears
4. Yucca
5. Bluebonnets
6. Indian Paintbrush
7. Prickly Poppy
8. Cypress Tree
9. Cliff Face
10. River
11. Clouds