A plant of the division Pteridophyta, i.e. a fern, horsetail, or clubmoss.
- ‘This manual describes all of the flowering plants and vascular cryptogams, both native and naturalized, occurring within the borders of British Columbia.’
- ‘There are a few references worth checking out if you are interested in pursuing ferns and fern allies (the vascular cryptogams) further.’
- ‘There is not a hint of flower or bud to be seen, but this is not a flowering plant at all; it is a cryptogam, a vascular cryptogam, classed with ferns and horse-tails and club-mosses.’