Probably 1927. The mid-1920's was when she began to be noticed a lot.
Source:
http://artpassions.com/art/1044-Floral-Art/0000013098-Georgia-OKeeffe-Yellow-Calla-Green-Leaves.html
Leaves That Are Green was created in 1965.
Green Leaves was created in 1838.
Flowers are mainly red, yellow, orange. Some pink and salmon. leaves can be green or red/orange striped. I know violet, white too.
Some are. They are usually green or a yellowish-green.
The two types are the green and yellow leaves
When The Green Leaves Turn To Gold was created in 1914.
Green leaves, white petals with yellow centers
Jamaican Green-and-yellow Macaw was created in 1847.
Dominican Green-and-yellow Macaw was created in 1908.
Because - lack of sunlight prevents the leaves from making chlorophyll - the chemical that turns leaves green.
When a banana begins to ripen, the peel begins to change color. It changes from green to yellow to brown. The same occurs with autumn leaves. The green leaves change from green to red and yellow and orange and eventually brown.
Honey locust leaves are normally green. However, they turn yellow for several reasons. One is that they are simply new leaves that have not yet gotten their green coloring. Two is that they turn yellow in fall, and are about to drop off the tree.