 Blue marsh iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Blue iris with water drops in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Blue flowers of iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Blue iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Blue iris flowers (Iridodictyum histrioides) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blue iris flowers Iridodictyum Katharine Hodgkin in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Flowers of pygmy iris (Iris pumila) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Flower of pygmy iris (Iris pumila) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Pink iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Violet flower of pygmy iris (Iris pumila) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 26, 2014
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 24, 2010
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 23, 2009
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 27, 2009
 Blue iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 23, 2009
 Blue iris flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 13, 2014
 Blue and yellow iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Blue and white iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 27, 2009
 Dark blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 13, 2014
 Blue iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 13, 2014
 Central part of a blue iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 23, 2009
 Blue asters in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Blue viola flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Blue flowers of geranium in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Iris flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Blooming iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Iris flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Yellow iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 2, 2016
 Purple iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 10, 2009
 Blue flowers of a marsh orchid in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Blue striped flowers of geranium in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Blue eryngo (Eryngium planum) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 28, 2017
 Water flag (yellow iris, Iris pseudacorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Yellow iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 2, 2016
 Yellow iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Deep blue flowers of mint(?) family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Violet iris flowers (Iridodictyum) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blooming iris Iridodictyum histrioides in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Water flag (yellow iris, Iris pseudacorus) in a pond in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 18, 2011
 Yellow flower of swamp iris (water flag, Iris pseudacorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Iris flowers Iridodictyum Katharine Hodgkin in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Iris flowers Iridodictyum Katharine Hodgkin in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 29, 2017
 Iris flowers Iridodictyum Katharine Hodgkin in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Violet iris flowers (Iridodictyum histrioides) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blue hyacinth in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 15, 2017
 Blue primrose (Primula) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 15, 2017
 Blue primrose (Primula) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 6, 2017
 Various blue flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 29, 2017
 Blue hyacinths(?) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Chionodoxa Blue Giant in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 4, 2017
 Blue flower of periwinkle in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Blue aster in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 10, 2009
 Blue asters in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Blue bugle (Ajuga reptans) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 27, 2017
 Blue primrose (Primula) in bloom in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 6, 2017
 Blue crocus flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 29, 2017
 Some blue flower in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, February 23, 2017
 Blue thistle flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 5, 2017
 Blue primrose flowers (Primula) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Blue crocus flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blue flowers of fumewort (Corydalis) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 6, 2017
 Blue flowers of forget-me-not (Myosotis) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 27, 2017
 Blue crocus flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blue flowers in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 8, 2017
 Blue bugle (Ajuga reptans) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 28, 2017
 Small blue flowers of veronica in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Blue viola flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Blue thistle flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Flower of blue thistle in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Blue crocus flower buds in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blue flowers of Liverleaf (Hepatica nobilis) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 4, 2017
 Blue flowers of azalea (Rhododendron) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Spring flower with blue buds in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Blue flowers of lily family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 29, 2017
 Blue bugle (Ajuga reptans) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 5, 2017
 Blue flowers of fumewort (Corydalis) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Blue orchid flowers in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 8, 2017
 Blue squill (Scilla) flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Yellow and blue crocus flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Purple iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Yellow iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, August 30, 2013
 Three flowers of iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Pink iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 13, 2014
 Small iris flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Violet iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 18, 2011
 Blue flax (Linum perenne) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 2, 2016
 Blue flowers of snapdragon family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
 Blue flower of lily family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 13, 2010
 Blue eryngo (Eryngium planum) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 18, 2016
 Blue inflorescence on a small bush in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
 Blue flowers of speedwell (Veronica)(?) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Blue flowers of squill (Scilla armena) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 2, 2017
 Blue flowers of Alpine Squill (Scilla bifolia) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 6, 2017
 Blue flowers of Hepatica (Pechonochnitsa in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 12, 2017
 Masses of blue flowers of Liverleaf (Hepatica nobilis) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 4, 2017
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