Leonurus cardiaca
An introduced species found in most of the United States in moist habitats. The leaves are deeply lobed at the base of the plant and become simpler as you move up the stem. The calyx lobes are somewhat spinose.
Flowering stems in Silver Canyon along NM Hwy. 159, Catron County, New Mexico, 16 Aug 2009.
Flowers in Silver Canyon, 16 Aug 2009.
A leaf at mid-stem, Silver Canyon, 16 Aug 2009.
A leaf on the upper stem, Silver Canyon, 16 Aug 2009.
Calyces with immature nutlets, Silver Canyon, 16 Aug 2009.
More flowers, Silver Canyon, 16 Aug 2009.