Northern New Mexico, USA. Riparian area, 2120m (6955ft) Not sure if this is flower, yet. Edit: Based on the response from @togata57, I split open the stalk and found a white milky sap. For science, I put some on the back of my hand and yep, dermatitis. Edit again: Add photo
@allelopath, it's better to post a reply than to edit a previous posting. In this case, no one, including @togata57, would get any indication that you have added content, except that my comment here will cause it to show again under New posts and will notify togata57.