Below is a working checklist of Mount Desert Island's monilophytes. Please send corrections and updates to info@vfthomas.com. Photographs are welcome. Thank you.
| Family | Genus | Specific Epithet | authority | Sub-specific Epithet | authority | common name or hybrid formula | Sources (full citations given after this table) |
| Aspleniaceae | Asplenium | trichomanes | L. | ssp. trichomanes | maidenhair spleenwort | Greene et al. (2005) | |
| Blechnaceae | Woodwardia | virginica | (L.) Smith | Virginia chain fern | Greene et al. (2005) | ||
| Dennstaedtiaceae | Dennstaedtia | punctilobula | (Michx.) T. Moore | hay-scented fern | Greene et al. (2005) | ||
| Dennstaedtiaceae | Pteridium | aquilinum | (L.) Kuhn | ssp. latiusculum | (Desv.) Hulten | northern bracken fern | Greene et al. (2005); Vining (2007) |
| Dryopteridaceae | Dryopteris | campyloptera | (Kunze) Clarkson | mountain wood fern | Greene et al. (2005); Vining (2007) | ||
| Dryopteridaceae | Dryopteris | carthusiana | (Vill.) H. P. Fuchs | spinulose wood fern | Greene et al. (2005) | ||
| Dryopteridaceae | Dryopteris | cristata | (L.) Gray | crested wood fern | Greene et al. (2005) | ||
| Dryopteridaceae | Dryopteris | fragrans | (L.) Schott | fragrant wood fern | Greene et al. (2005) | ||
| Dryopteridaceae | Dryopteris | intermedia | (Muhl. ex Willd.) Gray | evergreen wood fern | Greene et al. (2005); Vining (2007) | ||
| Dryopteridaceae | Dryopteris | marginalis | (L.) Gray | marginal wood fern | Greene et al. (2005); Vining (2007) | ||
| Dryopteridaceae | Polystichum | acrostichoides | (Michx.) Schott | Christmas fern | Greene et al. (2005); Vining (2007) | ||
| Equisetaceae | Equisetum | arvense | L. | field horsetail | Greene et al. (2005) | ||
| Equisetaceae | Equisetum | fluviatile | L. | river horsetail | Greene et al. (2005) | ||
| Equisetaceae | Equisetum | sylvaticum | L. | wood horsetail | Greene et al. (2005) | ||
| Onocleaceae | Onoclea | sensibilis | L. | sensitive fern | Greene et al. (2005); Vining (2007) | ||
| Ophioglossaceae | Botrychium | virginianum | (L.) Sw. | rattlesnake fern | Greene et al. (2005) | ||
| Ophioglossaceae | Ophioglossum | pusillum | Raf. | northern adder's-tongue fern | Greene et al. (2005) | ||
| Osmundaceae | Osmunda | cinnamomea | L. | cinnamon fern | Greene et al. (2005); Vining (2007) | ||
| Osmundaceae | Osmunda | claytoniana | L. | interrupted fern | Greene et al. (2005); Vining (2007) | ||
| Osmundaceae | Osmunda | regalis | L. | var. spectabilis | (Willd.) Gray | royal fern | Greene et al. (2005) |
| Polypodiaceae | Polypodium | appalachianum | Haufler & Windham | Appalachian polypody | Greene et al. (2005) | ||
| Polypodiaceae | Polypodium | virginianum | L. | rock polypody | Greene et al. (2005) | ||
| Pteridaceae | Adiantum | pedatum | L. | northern maidenhair fern | Greene et al. (2005) | ||
| Thelypteridaceae | Parathelypteris | noveboracensis | (L.) Ching | New York fern | Greene et al. (2005) as Thelypteris noveboracensis; Vining (2007) | ||
| Thelypteridaceae | Phegopteris | connectilis | (Michx.) Watt | long beech fern | Greene et al. (2005); Vining (2007) | ||
| Thelypteridaceae | Thelypteris | palustris | Schott | var. pubescens | (Lawson) Fern. | marsh fern | Greene et al. (2005) |
| Woodsiaceae | Athyrium | angustum | (Willd.) C. Presl. | northern lady fern | Greene et al. (2005) as Athyrium filix-femina var. angustum | ||
| Woodsiaceae | Cystopteris | fragilis | (L.) Bernh. | fragile fern | Greene et al. (2005) | ||
| Woodsiaceae | Cystopteris | tenuis | (Michx.) Desv. | Mackay's fragile fern | Greene et al. (2005) | ||
| Woodsiaceae | Deparia | acrostichoides | (Sw.) M. Kato | silvery spleenwort | Greene et al. (2005) | ||
| Woodsiaceae | Gymnocarpium | dryopteris | (L.) Newman | oak fern | Greene et al. (2005) | ||
| Woodsiaceae | Woodsia | ilvensis | (L.) R. Br. | rusty cliff fern | Greene et al. (2005) |