48 cards where the illustration contains “fern”

Anurid Brushhopper (Judgment #137)
Bishop of Rebirth (Ixalan #5)
Blighted Woodland (Battle for Zendikar #233)
Cat (Core Set 2021 Tokens #11)
Concordant Crossroads (Legends #179)
Deep Reconnaissance (Odyssey #236)
Defiant Greatmaw (Amonkhet #163)
Ebony Treefolk (Apocalypse #97)
Elusive Otter // Grove's Bounty (Wilds of Eldraine #225)
Everdawn Champion (Rivals of Ixalan #6)
Explosive Vegetation (Onslaught #263)
Fecundity (Ultimate Masters #165)
Forest (Murders at Karlov Manor #286)
Forest (Ixalan #278)
Forest (Khans of Tarkir #266)
Forest (Khans of Tarkir #269)
Forest (Magic 2010 #248)
Forest (Lorwyn #301)
Forest (Odyssey #347)
Forest (Odyssey #350)
Forest (Starter 1999 #173)
Fruition (Portal #166)
Invigorating Boon (Onslaught #267)
It of the Horrid Swarm (Eldritch Moon #8)
Ixalli's Diviner (Ixalan #192)
Lunge (Mercadian Masques #203)
Misleading Motes (Wilds of Eldraine #61)
Misty Rainforest (Secret Lair: Ultimate Edition #5)
Naturalize (Khans of Tarkir #142)
Nature's Spiral (Magic 2010 #196)
Once Upon a Time (Throne of Eldraine #169)
Panther Warriors (Visions #115)
Primal Amulet // Primal Wellspring (Ixalan #243)
Primal Amulet // Primal Wellspring (Ixalan #243)
Prying Blade (Ixalan #244)
Ring of Kalonia (Magic 2013 #212)
Sagu Mauler (Khans of Tarkir #196)
Sai, Master Thopterist (Core Set 2019 #69)
Snake (Khans of Tarkir Tokens #9)
Sol Ring (Secret Lair Drop #1074)
Sporemound (Magic 2014 #196)
Swamp (Khans of Tarkir #259)
Swamp (Khans of Tarkir #260)
Thriving Grove (Jumpstart #34)
Unflinching Courage (Dragon's Maze #111)
Verdant Eidolon (Dissension #100)
Wildest Dreams (Kaladesh #174)
Wolf (Born of the Gods Tokens #9)
Zameck Guildmage (Gatecrash #209)

Though this query has ended, its relics still slumber in New Argive.