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 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
