 Fern leaf in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, January 5, 2016
 Leaf of fern in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 8, 2017
 Fern leaf damaged by frost over a stream in Hamilton Pool Preserve, west from Austin. Texas, January 12, 2013
 Branching fern leaf in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, January 5, 2016
 Fern leaf lavender (Lavandula multifida) in Antique Rose Emporium. Independence, Texas, March 26, 2010.
 Details of a fern leaf in a greenhouse in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, February 23, 2017
 Round leaf of fern in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, January 5, 2016
 Dew on a leaf of fern near Fall Creek and arboretum. Ithaca, New York, October 11, 2005
 Fern leaf in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 26, 2014
 Fern leaf in a forest in Pavlovsk Park. South from Saint Petersburg, Russia, July 21, 2012
 Back lit fern leaf in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, January 5, 2016
 Fern leaf in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 31, 2013
 Young leaf of bracken fern (Pteridium aquilinum) in Menkovo, south from Saint Petersburg. Russia, June 4, 2014
 Fern leaf in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 9, 2014
 Back side of a fern leaf in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, January 5, 2016
 Hairy fern leaf in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, January 5, 2016
 Fine leaf of fern in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 8, 2017
 Rusty underside of a leaf of northern oak fern Gymnocarpium dryopteris affected by a fungal disease fir-oak-fern rust (Hyalopsora aspidiotus) near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, July 14, 2017
 Fir-oak-fern rust (Hyalopsora aspidiotus) fungus on a leaf of northern oak fern Gymnocarpium dryopteris near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, July 14, 2017
 Fern leaf in Sobstvennaya Dacha Park. Old Peterhof, west from Saint Petersburg, Russia, May 17, 2019
 Fern leaf in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
 Fern leaf in Dubki Park in Sestroretsk, west from Saint Petersburg. Russia, May 20, 2019
 Leaf of resurrection fern (Pleopeltis polypodioides) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 26, 2020
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