Below is a working checklist of Mount Desert Island's nonflowering seed plants. For more information about a particular species, click on the link under the heading "common name or hybrid formula".
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 | Source (full citation given after this table) |
| Cupressaceae | Juniperus | communis | L. | var. depressa | Pursh | common juniper | Greene et al. (2005) |
| Cupressaceae | Juniperus | horizontalis | Moench |   |   | creeping juniper | Greene et al. (2005) |
| Cupressaceae | Thuja | occidentalis | L. |   |   | northern white cedar | Greene et al. (2005) |
| Pinaceae | Abies | balsamea | (L.) P. Mill. |   |   | balsam fir | Greene et al. (2005) |
| Pinaceae | Larix | laricina | (Du Roi) K. Koch |   |   | larch, hackmatack, tamarack | Greene et al. (2005) |
| Pinaceae | Picea | glauca | (Moench) Voss |   |   | white spruce | Greene et al. (2005) |
| Pinaceae | Picea | mariana | (P. Mill.) B. S. P. |   |   | black spruce | Greene et al. (2005) |
| Pinaceae | Picea | rubens | Sarg. |   |   | red spruce | Greene et al. (2005) |
| Pinaceae | Pinus | banksiana | Lambert |   |   | jack pine | Greene et al. (2005) |
| Pinaceae | Pinus | resinosa | Ait. |   |   | red pine | Greene et al. (2005) |
| Pinaceae | Pinus | rigida | P. Mill. |   |   | pitch pine | Greene et al. (2005) |
| Pinaceae | Pinus | strobus | L. |   |   | white pine | Greene et al. (2005) |
| Pinaceae | Pinus | sylvestris | L. |   |   | Scotch pine | Greene et al. (2005) |
| Pinaceae | Tsuga | canadensis | (L.) Carr. |   |   | eastern hemlock | Greene et al. (2005) |
| Taxaceae | Taxus | canadensis | Marsh. |   |   | American yew | Greene et al. (2005) |