Saw this at the huntington gardens - blue puya (puya berteroniana) native to chile . is a terrestrial bromeliad related to the pineapple . bees & birds love it . I have seen one of these in a botanical gardens and yes it IS this blue.
One of the most deadly plant toxins, abrin, is produced by rosary pea (Abrus precatorius). As little as of toxin per body weight will cause fatality in humans (a single seed). Birds appear to be unaffected by the deadly toxin.