 Yellow iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Yellow iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 2, 2016
 Yellow flower of swamp iris (water flag, Iris pseudacorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Flower of pygmy iris (Iris pumila) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Water flag (yellow iris, Iris pseudacorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Violet flower of pygmy iris (Iris pumila) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Water flag (yellow iris, Iris pseudacorus) in a pond in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 18, 2011
 Yellow iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, August 30, 2013
 Blue and yellow iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Iris flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Yellow flag (Iris pseudacorus(?)) 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
 Purple flower of iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Blue iris flower 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 13, 2014
 Yellow flower of lily family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Yellow flower of lily family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Yellow flower of scabiosa in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 13, 2010
 Yellow flower of scabiosa in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Yellow flower of threadleaf coreopsis (thread-leaved tickseed, Coreopsis verticillata) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Small iris flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Flowers of pygmy iris (Iris pumila) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2017
 Central part of a blue iris flower 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, July 16, 2015
 Pink iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Purple iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 10, 2009
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Yellow stonecrop in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 29, 2016
 Yellow lilies in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Blue marsh iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Flower bud of an orange flower of aster family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Daisy flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Flower umbels in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 18, 2016
 Dianthus flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Thistle flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Flower patch in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 18, 2016
 Daisy flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Flower buds of yellow flowers of aster family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Yellow flower of Heartleaf oxeye (Telekia speciosa) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 16, 2015
 Yellow eastern pasque flower (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Yellow eastern pasque flower (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Blue iris with water drops in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 4, 2017
 Yellow lily (Lilium Golden Cup ) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Close up of yellow eastern pasque flower (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Blooming yellow eastern pasque flower (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Blooming yellow eastern pasque flower (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Close up of yellow eastern pasque flower (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Sedum flower buds in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Small lily flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Orange daisy flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Red avens flower (Geum) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Sedum flower buds in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 29, 2016
 Purple clematis flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 African daisy flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 White flower of mallow family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Yellow flowers of summer ragwort (Ligularia dentata) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 18, 2016
 Flower bud of Carlina fennica (Russian name Koliuchnik) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 2, 2016
 Yellow flower of aster family Senecio pseudoarnica (seaside ragwort)(?) in rock garden in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
 Helmet flower (monkshood, Aconitum, Russian name Borets) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 2, 2016
 Balloon flower (Chinese bellflower, Platycodon grandiflorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 18, 2016
 Flower heads of blue eryngo (Eryngium planum) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 29, 2016
 Balloon flower (Korean bellflower, Platycodon grandiflorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Some greenish yellow flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 27, 2017
 Yellow flower of Kuril Tea(?) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2011
 Yellow eastern pasque flowers (Pulsatilla flavescens, wind flower, meadow anemone, prostrel or son trava in Russian) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Yellow flower of Tulipa iliensis in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 15, 2015
 Close up of yellow and purple flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 29, 2009
 Yellow daisy like flower in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 23, 2009
 Yellow flower of lily family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 29, 2009
 Flower bud of yellow daisy 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, May 26, 2014
 Light blue balloon flower (Korean bellflower, Platycodon grandiflorus) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 26, 2016
 Yellow daisy in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Yellow flower of rose family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Yellow flower of lily family in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Shoots of yellow pasque flower (Pulsatilla) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 15, 2017
 Violet iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 18, 2011
 Blooming iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 20, 2017
 Three flowers of iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Iris flowers 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, June 27, 2009
 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
 Pink iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 13, 2014
 Blue 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
 Blue iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 23, 2009
 Purple iris in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Yellow aster in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 15, 2016
 Yellow trees in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 26, 2016
 Yellow leaves of elm in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 20, 2016
 Yellow leaves in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 15, 2016
 Yellow foliage in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 15, 2016
 Yellow flower of largeflower bellwort (Uvularia grandiflora) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 22, 2011
 Yellow and purple orchid flower in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, February 23, 2017
 Shoots of yellow pasque flower (Pulsatilla) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 21, 2017
 Yellow flower of Schaueria calycotricha in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, February 23, 2017
 Flower bud of anemone(?) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 10, 2016
 Painting of iris flowers in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 23, 2009
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