Red flowers of vervain (verbena) in Antique Rose Emporium. Independence, Texas, November 8, 2009
Verbena bonariensis (Vervain) flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
Vervain flower in dew in Washington-on-the-Brazos State Historic Site, near Loop Trail. Washington, Texas, April 5, 2008
Veiny vervain (Verbena rigida) flowers in TAMU Holistic Garden in Texas A and M University. College Station, Texas, April 16, 2008
Verbena (vervain) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 31, 2008
Texas vervain flower in Old Baylor Park. Independence, Texas, April 13, 2008
Close up of a cluster of flowers of rose vervain (Verbena canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richardson, Texas, February 22, 2009
Slender vervain (verbena) flowers in Lick Creek Park. College Station, Texas, March 25, 2009
Violet flowers of Wright s vervain (Verbena wrightii)(?) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, January 9, 2009
Red verbena flowers of Peruvian mock vervain (Glandularia peruviana) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 20, 2013
Flower of Wright s vervain (Verbena wrightii) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, May 15, 2008
Vervain (verbena) flower near Horseshoe Lake in Brazos Bend State Park. Needville, Texas, December 14, 2008
Verbena bonariensis (vervain) flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 11, 2016
Flowers of rose vervain (Glandularia canadensis) at Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2019
Flowers of rose vervain (Glandularia canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
Flower of rose vervain (Glandularia canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, February 16, 2019
Flowers of vervain (verbena) in Antique Rose Emporium. Independence, Texas, March 20, 2019
Flowers of vervain (Verbena) in Antique Rose Emporium. Independence, Texas, April 14, 2021
Flowers of rose vervain (Glandularia canadensis) on Forest Service Road 231 near North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 5, 2022
Flowers of rose vervain (Glandularia canadensis) on North Wilderness Trail in Sam Houston National Forest near Montgomery. Texas, April 14, 2022
Pink flowers of rose vervain (Glandularia canadensis) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 11, 2023
Flowers of slender vervain (verbena) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 28, 2024
Flowers of rose vervain (Glandularia canadensis) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest near Montgomery. Texas, March 1, 2026
