Sceptridium

Sceptridium is a genus of seedless vascular plants in the family Ophioglossaceae, closely allied to (and often included as a subgenus of) the genus "Botrychium" (the moonworts and grapeferns). It is also closely related to the genus "Botrypus" (the rattlesnake fern, often treated as the subgenus "Osmundopteris" under "Botrychium"). "Sceptridium" species are commonly called the grape-ferns.
These plants are small with fleshy roots, and reproduce by spores shed into the air. They differ from the moonworts in having at least some sterile fronds (all fronds in "Botrychium" are spore-bearing), and in the fronds being bi- or tri-pinnate ("Botrychium" are single pinnate, or rarely bipinnate); and from "Botrypus" in being evergreen, or at least winter-green ("Botrypus" are deciduous) and having the non-spore-bearing part of the frond long-stalked (short-stalked in "Botrypus").
Species.
"Sceptridium" species and their "Botrychium" synonyms include: