Flowing Cactus
Unidentified striking Cactus at Chicago Botanical Gardens
Follow up: 9:05 pm 7/21/17 Just checked the Chicago Botanical Plant Directory and this particular cactus is listed as "Madagascar Ocotillo Alluaudia procera" Attached is also the original photo. So everyone is correct, and I learned something. 😊 Thank you Dave and Baja.