Important information about tourism in Costa Rica - Florida

Frederic Edwin Church, American, 1826–1900, oil sketch showing the top of one palm tree, with a glorious crown of palm fronds, beside a pair of coarse, scaly trunks belonging to two different palm trees, June 1865, oil on paperboard

I'm guessing he painted this over a prepared gradation for the sky color. Click on the image to get the full study.