verbena genus --- vervain family

bigbract verbena (Verbena bracteata) -- in May -- Orchard Cove Trail, Lory State Park, CO          blue & purple          CO-LSP

bigbract verbena (Verbena bracteata) -- in July -- Sportsman Lake Road, southeastern Wyoming       WY-S

​bigbract verbena (Verbena bracteata) -- in August -- Orchard Cove Trail, Lory State Park, CO  

rose vervain (Verbena canadensis) -- in April -- J. T. Nickel Preserve, OK         red & pink     OK-N

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               CO-LSP         

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    ​   NM-S