A casual 1920s screened porch is furnished with elements familiar still.
A few judiciously placed houseplants bring the outdoors in. A jardinière (plant stand) makes for attractive groupings and easier plant maintenance.
As popular as card games in the Teens and Twenties, bridge lamps extend a shaded, down-facing bulb. Hyde Park bridge lamp, houseoftroy.com.
Durable natural-fiber rugs such as jute, sisal, and seagrass are ideal for indoor-outdoor environments like porches. Tri-stripe jute rug, cb2.com.
In the days before A/C, awnings shaded windows to keep rooms cool. Their color and flutter add cheerful period appeal (and keep A/C cost down). San Francisco awning, awntech.com.
Wicker was a mainstay for porches in the late 19th and early 20th centuries; this sky blue is a twist on the more common white and natural. Francine wicker sofa, from mainecottage.com.