Sneezewort yarrow (Achillea ptarmica, Russian name chihotnik) in fields near Deviatkino in northern Saint Petersburg. Russia, July 25, 2016
Pink milfoil (Achillea millefolium, yarrow) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, April 9, 2010
Pink milfoil (Achillea millefolium, yarrow) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, April 26, 2010
Pink milfoil (Achillea millefolium, yarrow) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, June 12, 2008
Purple flowers of milfoil (Achillea millefolium, yarrow) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
Pink milfoil (Achillea millefolium, yarrow) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, May 31, 2008
Yarrow (Achillea millefolium) in Antique Rose Emporium. Independence, Texas, May 13, 2012
Sneezewort yarrow (Achillea ptarmica, Russian name chihotnik) in fields west from Deviatkino. Saint Petersburg, Russia, June 29, 2011
Pink milfoil (Achillea millefolium, yarrow) in Antique Rose Emporium. Independence. Texas, March 15, 2009
Pink milfoil (Achillea millefolium, yarrow) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, April 28, 2009
Milfoil (Achillea millefolium, yarrow) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, May 15, 2008
Yellow flowering milfoil (yarrow, Achillea millefolium) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, June 3, 2010
Scorpionfly and a fly on flowers of yarrow (Achillea millefolium, Russian name Tysiachelistnik) in a forest in Posiolok, near Vyritsa, 50 miles south from Saint Petersburg. Russia, July 9, 2016
Flat-topped cluster of pinkish flowers of milfoil (Achillea millefolium, yarrow) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, May 28, 2008
Pinkish flowers of milfoil (Achillea millefolium, yarrow) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
Sneezewort yarrow (Achillea ptarmica, Russian name chihotnik) in fields west from Deviatkino. Saint Petersburg, Russia, July 20, 2012
Sneezewort yarrow (Achillea ptarmica, Russian name chihotnik) flowers in dew east from Toksovo, 10 miles north from Saint Petersburg. Russia, July 9, 2009
Yarrow (Achillea millefolium) east from Kuzmolovo, 7 miles north from Saint Petersburg. Russia, June 22, 2011
Milfoil (Achillea millefolium, yarrow) near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, June 16, 2012
Milfoil (Achillea millefolium, yarrow) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Woolly yarrow (Achillea tomentosa) with flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 21, 2015
Woolly yarrow (Achillea tomentosa) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 21, 2015
Sneezewort yarrow (Achillea ptarmica, Russian name chihotnik) near Olginsky Pond. Saint Petersburg, Russia, July 18, 2016
