Euphorbia erythrocucullata

Native to southwestern Madagascar, this semi-succulent spurge grows on limestone formations in dry forest. It belongs to the crown-of-thorns group and resembles related species when not flowering. Its distinctive flower clusters are enclosed by a pair of red, beak-like bracts about three-quarters to one and a quarter inches long. The milky sap can irritate skin and eyes, and the plant is harmful if eaten. Photographed in Florida.