Orange flower of Mexican Sunflower (Tithonia rotundifolia) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, May 31, 2008
Disk flowers of common sunflower (Helianthus annuus) in Onaiza area. Doha, Qatar, March 24, 2016
Sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, June 20, 2008
Sunflower on roadside of Road 364, near Sugarloaf Mountain. Gause, Texas, August 8, 2009
Orange flower of sunflower family in TAMU Holistic Garden in Texas A and M University. College Station, Texas, January 24, 2009
Blooming common sunflower (Helianthus annuus) in Onaiza area. Doha, Qatar, March 24, 2016
Yellow flower of common sunflower (Helianthus annuus) in Onaiza area. Doha, Qatar, March 24, 2016
Sunflower and lemon beebalm near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Orange flower of sunflower family in TAMU Holistic Garden in Texas A and M University. College Station, Texas, January 10, 2009
Orange flower of Tithonia rotundifolia (Mexican Sunflower) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, May 31, 2008
Sunflower on roadside of Road 364, near Sugarloaf Mountain. Gause, Texas, September 20, 2008
Sunflower head in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, October 21, 2008
Petals of sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 7, 2011
Sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 31, 2011
Sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, June 28, 2012
Spotted cucumber beetles (Diabrotica undecimpunctata) on Mexican Sunflower in TAMU Holistic Garden in Texas A and M University. College Station, Texas, November 14, 2010
Seeds of sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, October 28, 2008
Common sunflower (Helianthus annuus) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Sunflower (Helianthus annuus) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Yellow flowers of sunflower family in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
Yellow flower of sunflower family in Kuzmolovo, 10 miles north from Saint Petersburg. Russia, June 11, 2011
Petals of sunflower (Helianthus annuus) in Lake Bryan Park. Bryan, Texas, July 20, 2014
Bumblebee on Mexican Sunflower (Tithonia rotundifolia) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, August 3, 2008
Sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 11, 2009
Sunflowers spreading over Lou Cashion Memorial Garden in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 24, 2013
Mexican Sunflower (Tithonia rotundifolia) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, July 27, 2008
Bee on sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, October 17, 2008
Sunflowers in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, May 28, 2008
Back lit petals of sunflower (Helianthus) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 9, 2012
Green lynx spider on Mexican sunflower(?) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, June 28, 2008
Sunflower in TAMU Holistic Garden in Texas A and M University. College Station, Texas, August 1, 2009
Flower of common sunflower (Helianthus annuus) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Ripening sunflower seeds in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, November 17, 2008
Dwarf sunflowers (Old-man-of-the-mountain, Rydbergia grandiflora, Hymenoxys grandiflora) on a slope of Colony Baldy Mountain in Sangre de Cristo Mountains. Colorado, July 3, 2007
Orange flower of Mexican Sunflower (Tithonia rotundifolia) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 11, 2009
Seeds of a plant of sunflower family on roadside of a road to Zubara in area of Al Magdah farms in northern Qatar, May 2, 2014
Sunflower (Helianthus annuus) under power lines in Lake Bryan Park. Bryan, Texas, July 20, 2014
Orange flower of Mexican Sunflower (Tithonia rotundifolia) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, October 22, 2008
Sunflower bud in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, May 21, 2012
Sunflowers near High Ridge Trail in Rock Bridge State Park. Columbia, Missouri, September 17, 2005
Orange flower of Tithonia rotundifolia (Mexican Sunflower) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, August 15, 2010
Flower head of common sunflower (Helianthus annuus) on roadside near Twar Mall in Um Lekhba neighborhood. Doha, Qatar, February 29, 2016
Ripening sunflower seeds in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, November 6, 2008
Sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 7, 2011
Sunflower bud in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
Sunflower seed for sale in spice section in Souq Waqif (Old Market). Doha, Qatar, December 23, 2014
Common sunflower (Helianthus annuus) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 8, 2012
Sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 16, 2013
Sunflower on Deer Run Trail near a bridge in Lick Creek Park. College Station, Texas, August 28, 2008
Tickseed Sunflower (Bidens aristosa) in Huntsville State Park, on north-east side of Lake Raven, view from Chinquapin Trail. Texas, October 4, 2008
Orange flower of Tithonia rotundifolia (Mexican Sunflower) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, October 10, 2010
Yellow flowers of sunflower family on a beach in Solnechnoe, west from Saint Petersburg. Russia, June 30, 2011
Close up of sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, September 10, 2012
Sunflowers in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, October 18, 2008
Orange flower of Tithonia rotundifolia (Mexican Sunflower) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, October 23, 2010
Petals of sunflower (Helianthus) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 9, 2012
Sunflower seeds in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, November 21, 2008
Sunflower in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 20, 2013
Gourd, castor beans and sunflowers in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, November 2, 2012
Sunflowers (Helianthus hirsutus?) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
Sunflower seeds in spice section of Souq Waqif (Old Market). Doha, Qatar, April 24, 2013
Sunflowers on a trail near Battle Ground, north from Lafayette IN, September 11, 1999.
Orange sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, May 21, 2012
Petals of an orange sunflower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, May 21, 2012
Sunflower (Helianthus annuus) in Lick Creek Park. College Station, Texas, July 7, 2012
Sunflower petals near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2013
Assassin bug nymph (Zelus longipes) on sunflower in Antique Rose Emporium. Independence, Texas, July 27, 2013
Sunflower seeds in spice section of Souq Waqif (Old Market). Doha, Qatar, February 8, 2014
Flower buds of a plant of sunflower family east from Kuzmolovo, north from Saint Petersburg. Russia, June 8, 2014
Sunflower near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 28, 2014
Sunflower (Helianthus annuus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2014
Sunflower (Helianthus annuus) in Lake Bryan Park. Bryan, Texas, July 20, 2014
Sunflower (Helianthus annuus) under power lines in Lake Bryan Park. Bryan, Texas, July 20, 2014
Close up of sunflower (Helianthus annuus) in Lake Bryan Park. Bryan, Texas, July 20, 2014
Close up of petals of sunflower (Helianthus annuus) in Lake Bryan Park. Bryan, Texas, July 20, 2014
Sunflower (Helianthus annuus)on a cutting under power lines in Lake Bryan Park. Bryan, Texas, July 20, 2014
Petals of sunflower (Helianthus annuus) under power lines in Lake Bryan Park. Bryan, Texas, July 20, 2014
Sunflower (Helianthus annuus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2014
Common sunflower (Helianthus annuus) in Lake Bryan Park. Bryan, Texas, July 31, 2014
Common sunflower (Helianthus annuus) on roadside near Twar Mall in Um Lekhba neighborhood. Doha, Qatar, February 29, 2016
Blooming common sunflower (Helianthus annuus) on roadside near Twar Mall in Um Lekhba neighborhood. Doha, Qatar, February 29, 2016
Common sunflower (Helianthus annuus) in Onaiza area. Doha, Qatar, March 24, 2016
Sunflower (Helianthus) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
Sunflower (Helianthus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2019
Petals of sunflower (Helianthus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2019
Agricultural fields with sunflowers on Tom Moore Road. Washington, Texas, May 24, 2020
Tickseed sunflower (Bidens) near Birch Creek Unit of Somerville Lake State Park. Texas, October 7, 2018
Tickseed sunflower (Bidens) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
Maximilian sunflower (Helianthus maximiliani) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 6, 2019
Sunflowers (Helianthus annuus) on Tom Moore Road. Washington, Texas, May 24, 2020
Globular seed pod of a plant of sunflower family near a gate at Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 4, 2020
Seed head of a plant of sunflower family near a gate at Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 4, 2020
Globular seed head of a plant of sunflower family near a gate at Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 4, 2020
Some plant similar to sunflower on a sewage line right of way in Lick Creek Park. College Station, Texas, July 18, 2020
Prairie sunflower (Helianthus petiolaris)(?) on a sand pile at the beginning of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
Seed head of prairie sunflower (Helianthus petiolaris)(?) on a sand pile at the beginning of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
Sunflower bud on sewage line right of way in Lick Creek Park. College Station, Texas, August 23, 2020
Maximilian sunflower (Helianthus maximiliani) on a forest clearing in Lick Creek Park. College Station, Texas, August 28, 2020
Blooming Maximilian sunflower (Helianthus maximiliani) on a forest clearing in Lick Creek Park. College Station, Texas, August 28, 2020
Maximilian sunflower (Helianthus maximiliani) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 1, 2020
Field of sunflowers from Farm-to-Market Road 159 near Washington. Texas, November 3, 2020
Tickseed sunflower (Bidens) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, November 6, 2020
Sunflower (Helianthus annuus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
Seed head of sunflower (Helianthus annuus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
Blooming sunflower (Helianthus annuus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
Blooming sunflower (Helianthus) in Lick Creek Park. College Station, Texas, August 1, 2021
Sunflower (Helianthus annuus) in Bee Creek Park. College Station, Texas, August 5, 2021
Beetle of yellow petals of sunflower (Helianthus) in Bee Creek Park. College Station, Texas, August 5, 2021
Sunflower (Helianthus) in the Gardens at Texas A and M University. College Station, Texas, August 10, 2021
Sunflower (Helianthus) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 11, 2021
Seed head of tickseed sunflower (Bidens) in Lick Creek Park. College Station, Texas, August 12, 2021
Seeds of tickseed sunflower (Bidens) in Lick Creek Park. College Station, Texas, August 12, 2021
Maximilian sunflower (Helianthus maximiliani) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, August 25, 2021
Blooming Maximilian sunflower (Helianthus maximiliani) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, August 25, 2021
Tickseed sunflower (Bidens) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2021
Sunflower (Helianthus) on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, September 12, 2021
Maximilian sunflower (Helianthus maximiliani) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 21, 2021
Field of sunflowers from Farm-to-Market Road 159 near Washington. Texas, December 24, 2021
Sunflower near Farm-to-Market Road 159 near Washington. Texas, December 24, 2021
Sunflower field in area of Millican, Brazos County, near Farm-to-Market Road 159. Texas, December 24, 2021
View of a sunflower field and trees in area of Millican, Brazos County, from Farm-to-Market Road 159. Texas, December 24, 2021
Flower bud of sunflower (Heliantus) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, July 7, 2022
Blooming sunflower (Heliantus) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, July 7, 2022
Ray florets of sunflower (Heliantus) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, July 7, 2022
Blooming sunflower (Heliantus) in front of greenhouses in TAMU Holistic Garden in Texas A and M University. College Station, Texas, July 7, 2022
Maximilian sunflower (Helianthus maximiliani) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 22, 2022
Cluster of achenes of tickseed sunflower (Bidens) on Lone Star Hiking Trail east from Trailhead 3 in Sam Houston National Forest near Montgomery. Texas, October 9, 2022
Rosette of leaves of a plant of sunflower family in Lick Creek Park. College Station, Texas, March 2, 2023
Leaves of squaw-weed (Senecio ampullaceus) with light yellow areas on leaves caused by sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
Squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
Underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
Shoots of Maximilian sunflower(?) in Lick Creek Park. College Station, Texas, March 7, 2023
Spores an conidia(?) (in KOH) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?), collected from white powdery stuff with web from underside leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos a day before. Texas, March 7, 2023
Spores (in Melzer) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) together with conidia of Alternaria leaf spot(?), collected from white powdery stuff with web from underside leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos a day before. Texas, March 7, 2023
Tissues (in Melzer) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?), collected from white powdery stuff with web from underside leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos a day before. Texas, March 7, 2023
