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