Vervain family (Verbenaceae)
whitebrush (Aloysia gratissima) -- in April -- Big Bend National Park, TX white & cream
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
wedgeleaf fogfruit (Phyla cuneifolia) -- in June -- Reservoir Ridge, Fort Collins Natural Area, CO white & cream
wedgeleaf fogfruit (Phyla cuneifolia) -- in June -- Pineridge, Fort Collins Natural Area, CO
bigbract verbena (Verbena bracteata) -- in May -- Orchard Cove Trail, Lory State Park, CO blue & purple
bigbract verbena (Verbena bracteata) -- in July -- Sportsman Lake Road, southeastern Wyoming
bigbract verbena (Verbena bracteata) -- in August -- Orchard Cove Trail, Lory State Park, CO
bigbract verbena (Verbena bracteata) -- in June -- Bellvue, Larimer County, CO
Texas vervain (Verbena halei) -- in April -- Big Bend National Park, Texas red & pink
swamp verbena (Verbena hastata) -- in August -- Lory State Park, CO blue & purple
swamp verbena (Verbena hastata) -- in August -- Tanglewood, Fort Collins Natural Area, CO
MacDougal vervain (Verbena macdougalii) -- in September -- Cloudcroft, Lincoln National Forest, NM blue & purple