Glandularia genus --- Vervain family

purple prairie vervain (Glandularia bipinnatifida) -- in April -- Presidio County, western Texas        red & pink   

purple prairie vervain (Glandularia bipinnatifida) -- in March -- Tonto National Forest, AZ       

​rose vervain (Glandularia canadensis) -- in April -- J. T. Nickel Preserve, northern Oklahoma      red & pink    

southwestern mock vervain (Glandularia gooddingii) -- in March -- Buenos Aires National Wildlife Refuge, AZ     red & pink    

beaked mock vervain (Glandularia quadrangulata) -- in April -- Big Bend National Park, Texas     white & cream     

wild verbena (Glandularia wrightii)  -- in May -- Reservoir Ridge Natural Area, Fort Collins, CO     red & pink      

wild verbena (Glandularia wrightii) -- in April -- Cimarron National Grassland, Kansas   red & pink