This is in Berkeley California. Lily family is about as far as I got. Looks subtropical.
my first guess is some sort of bromeliad, but I don't know much about tropicals!
Appears streaked as though virused, this may be causing it to flower abnormally.
I thought Fritillaria at first too, but they are not a very common bulb around here, I'd never seen one in person. I bet it looks more like a Fritillaria now!
Fritilaria imperialis, aka Crown Imperial, is my view too. As bboy says, there's something not quite right with it, but that's what it is.
This post was edited by floral_uk on Tue, Mar 18, 14 at 14:48