Every time I post a photo of this flowering tropical plant, I still don't know the name of it and I'm also never sure whether to call it pink or red. Taken in the ENMAX Conservatory at the Calgary Zoo on 30 September 2011. Later: "Jatropha integerrima, commonly known as Peregrina or Spicy Jatropha, is a species of flowering plant in the spurge family, Euphorbiaceae, that is native to Cuba and Hispaniola." From Wikipedia. Many thanks to the various Flickr members who identified this plant for me, below!