- 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
Species of Lycopodiella hybridize more frequently than other clubmosses in the region. With the exception of L. inundata, it is uncommon to find populations lacking hybrids, even when only one species is present. Sporophyll orientation is a very important character, but it cannot be assessed until late summer. Developing strobili have ascending sporophylls that eventually spread from the axis at maturity (except in L. appressa). Abortive-spored plants are present in New England, and not all circumstances appear to be explainable by differences in ploidy level. Reference: Bruce (1975).
1b. Horizontal shoots thicker, 1.2–3.1 mm thick, each segment producing 1–5 upright shoots; trophophylls of the horizontal shoot toothed; upright shoots usually taller than 10 cm [Figs. 13,14]
Show photos of: Each photo represents one species in this genus.