Sharps, sharps and sharps.  The serrated edges of epiphyllum join the puncturing thorns of the bougainvillea and the lacerating coil of razor wire to insure this wall and gate are unscalable.  That’s security Mexican style.

https://ceenphotography.com/2016/05/07/flower-of-the-day-may-8-2016-bearded-irises/