The specific epithet is referring to its habit of sometimes growing on logs, thus being high or exalted.
Son are found on the margins of the pinnules, hence the specific epithet, marginalis.
The specific epithet means "blunt" referring to the tips of the pinnules.
The specific epithet commemorates Roelof van den Bosch, a nineteenth century botanist who studied filmy ferns.
Both the specific epithet
and common name of this species are in reference to the wet habitats in which this plant is usually found.
The specific epithet is referring to the sporangia resembling the rattles of a rattlesnake (Crotalus).
The specific epithet is a misnomer based on an early drawing with a large, exaggerated rachis (Nelson 2000).
The specific epithet may refer to the flexible leaf stalks (petioles).
The specific epithet alludes to the wing-shaped fronds or possibly to the fiddleheads resemblance to an eagle's foot.
The specific epithet means black-foot" referring to the leaf bases, though they are not always black.
The specific epithet refers to the lack of a well developed creeping rootsystem; thus the plant is "footless" (Snyder and Bruce 1986).
The specific epithet of this species refers to the finger-like appearance of the branchlets.