Mirabilis linearis (Pursh) Heimerl
A Mirabilis readily identified by its narrow, linear leaves (unless you happen to be somewhere where Mirabilis coccinea also occurs).
Plant habit at Dripping Springs on the west side of the Organ Mountains, Doña Ana county, New Mexico, 19 Aug 2006.
Cauline leaves at Dripping Springs, 19 Aug 2006.