1.  potato fern(n = noun.plant) marattia salicina - large Australasian evergreen fern with an edible rhizome sometimes used as a vegetable by indigenous people;
is a kind of fern
is a member of genus marattia, marattia

2.  potato fern(n = noun.plant) solanopteris bifrons - small epiphytic fern of South America with tuberous swellings along rhizomes;
is a kind of fern
is a member of genus solanopteris, solanopteris

adder's fern, adder's tongue fern, air potato, alabama lip fern, alpine lady fern, american maidenhair fern, american parsley fern, american wall fern, annual fern, aquatic fern, asparagus fern, baked potato, ball fern, bamboo fern, basket fern, bead fern, bear's-paw fern, beech fern, bermuda maidenhair fern, berry fern, bird's nest fern, bird's-foot fern, black tree fern, bladder fern, boston fern, boulder fern, braun's holly fern, brazilian potato tree, bristle fern, brittle bladder fern, brittle fern, brittle maidenhair fern, broad beech fern, buckler fern, bulblet bladder fern, bulblet fern, button fern, california fern, canary island hare's foot fern, carolina pond fern, central american strap fern, chain fern, christmas fern, cinnamon fern, climbing bird's nest fern, climbing fern, climbing maidenhair fern, clover fern, coffee fern, colorado potato beetle, common staghorn fern, couch potato, cow-tongue fern, crape fern, creeping fern, crepe fern, curly grass fern, dagger fern, daisy-leaved grape fern, daisyleaf grape fern, deer fern, ditch fern, elkhorn fern, european parsley fern, evergreen wood fern, fan fern, farley maidenhair fern, felt fern, fern, fern ally, fern family, fern genus, fern palm, fern rhapis, fern seed, fiddlehead fern, film fern, filmy fern, five-fingered maidenhair fern, floating fern, florida strap fern, flower-cup fern, flowering fern, fragile fern, fragrant cliff fern, fragrant shield fern, fragrant wood fern, giant fern, giant potato creeper, giant scrambling fern, glade fern, glory fern, gold fern, golden fern, goldie's fern, goldie's shield fern, goldie's wood fern, grape fern, grass fern, hairy lip fern, hand fern, hard fern, hare's-foot bristle fern, hare's-foot fern, hart's-tongue fern, hartford fern, hay-scented fern, holly fern, hot potato, indian button fern, indian potato, interrupted fern, irish potato, jacket potato, jersey fern, kidney fern, killarney fern, king fern, lace fern, lady fern, leather fern, leatherleaf fern, leatherleaf wood fern, leathery grape fern, licorice fern, limestone fern, lip fern, little potato, long beech fern, maidenhair fern, male fern, marginal wood fern, marsh fern, mashed potato, massachusetts fern, meadow fern, mosquito fern, mountain bladder fern, mountain fern, mountain male fern, mountain parsley fern, narrow beech fern, narrow-leaved strap fern, nebraska fern, new york fern, northern beech fern, northern holly fern, northern oak fern, oak fern, oleander fern, ostrich fern, pine fern, potato, potato bean, potato beetle, potato blight, potato bug, potato chip, potato disease, potato family, potato fungus, potato mildew, potato mold, potato mosaic, potato moth, potato murrain, potato nose, potato pancake, potato peel, potato peelings, potato race, potato salad, potato scab bacteria, potato skin, potato tree, potato tuber moth, potato tuberworm, potato vine, potato wart, potato wart fungus, potato worm, potato yellow dwarf, potato yellow-dwarf virus, prickly shield fern, prince-of-wales fern, rabbit's-foot fern, rasp fern, rattlesnake fern, resurrection fern, ribbon fern, royal fern, sago fern, scale fern, scaly fern, scented fern, sea fern, seed fern, sensitive fern, serpent fern, shield fern, shuttlecock fern, silver fern, silver tree fern, skeleton fork fern, smooth lip fern, snake fern, snuffbox fern, soft shield fern, soft tree fern, southern beech fern, southwestern lip fern, spider fern, squirrel's-foot fern, stag-horn fern, staghorn fern, strap fern, sweet fern, sweet potato, sweet potato vine, sword fern, telingo potato, ten-day fern, tongue fern, toothed sword fern, tree fern, umbrella fern, uruguay potato, uruguay potato vine, venus'-hair fern, virginia chain fern, walking fern, wall fern, water fern, western holly fern, whisk fern, white potato, white potato vine, wild potato, wild potato vine, wild sweet potato vine, winter fern, wood fern, wooly lip fern, yellow dwarf of potato