| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Lycopodiaceae | Dendrolycopodium dendroideum | Tree Groundpine, Round-branch Clubmoss, Prickly Tree-clubmoss | Openings, grassy balds, high elevation spruce-fir and northern hardwood forests. | The northernmost of the L. obscurum complex, ranging from n. Québec and Newfoundland and Labrador (Newfoundland) west to Alaska, south to s. New Jersey, w. North Carolina, Missouri, Minnesota, South Dakota, Colorado, Montana, Idaho, and Washington. Petrewski (2020) found that plants previously attributed to D. dendroideum in e. Asia are not part of this species. |  (c) Fleming, Gary P. |
| Lycopodiaceae | Dendrolycopodium hickeyi | Delicate Tree-clubmoss, Pennsylvania Groundpine, Hickey's Tree-clubmoss | Grassy balds, bog margins, forest openings, acidic ridgetop forests. | N. Québec and Newfoundland and Labrador (Newfoundland) west to Minnesota, south to New Jersey, sw. North Carolina, and n. Indiana. |  (c) Fowler, Jim |
| Lycopodiaceae | Dendrolycopodium obscurum | Common Groundpine, Flat-branched Tree-clubmoss | Acidic forests. | Nova Scotia and New Brunswick west to Michigan and Wisconsin, south to n. Georgia, ne. Alabama, s. Indiana, n. Illinois (?), and c. Minnesota; China, Japan, Korea, e. Russia. |  (c) Fowler, Jim |