- 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
There exist two distinct and monophyletic lineages within the Selaginellaceae that could be recognized as genera. One lineage includes the species that lack rhizophores and have terete strobili ( Selaginella sensu stricto). The other lineage contains species with rhizophores and tetragonous strobili ( Lycopodioides). However, several nomenclatural issues stand in the way of dividing Selaginella. Reference: Valdespino (1993).
1a. Trophophylls monomorphic, spirally arranged, not in distinct ranks [Fig. 16]; axillary trophophylls absent at branching points
1b. Trophophylls dimorphic, arranged in 4 ranks, the 2 lateral ranks with larger leaves than the 2 median ranks [Fig. 15]; axillary trophophylls present at branching points
Show photos of: Each photo represents one species in this genus.