Max Brodie This plant is called sacred datura (Datura wrightii). Check out my spotting and the wiki link to verify: http://www.projectnoah.org/spottings/19788052
sjlehmann It is a species of Datura (http://en.wikipedia.org/wiki/Datura). Sometimes called Devil's Trumpet.
LuckyLogan My guess would be a moon flower, the leaves don't look quite right but the environment that it's growing in might have caused that.
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