Tourist tip #226 / Chew on the misnamed flower
At least you can with White Mustard, but beware the common giant fennel. It's poisonous.
Of course Juliet was right: a rose by any other name would smell as sweet. Still and all, it would be nice if the folks who named some of these flowers had been a wee bit more accurate. The upshot is that we do not always know what to expect.
Perhaps the number one misleadingly named species in Israel is White Mustard (in Hebrew, hardal lavan), the 80-120 centimeter high roadside vegetation...