- Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
Lycopodium has been split into smaller, homogeneous groups on the basis of sporophyte and gametophyte morphology, chromosome number, and anatomy (Bruce 1975, Øllgaard 1987, Wagner and Beitel 1993). These genera also have different life histories and hybridization patterns that support the recognition of multiple genera (rather than a broadly defined Lycopodium). Hybrids have not been reported from New England Lycopodium; however, intermediate forms are not uncommon at some locations.
Show photos of: Each photo represents one species in this genus.