KEY TO NEW ENGLAND PTERIDOPHYTES

KEY TO NEW ENGLAND PTERIDOPHYTES

Pteridophytes are vascular plants that reproduce by spores.

They have no flowers or seeds, and are generally larger than mosses.

Plants aquatic; leaves linear, in clumps; spores in swollen leaf bases - Isoëtes

Stems jointed, fluted, usually hollow; small leaves form sheath at nodes;

spores in terminal strobilus - Horsetails

Leaves small; spores of two sizes, on terminal strobilus with flattened sides* - Selaginellas

Small needle-like leaves; spores at leaf axil - Club-mosses

Leaves expanded, with forking veins; spores on leaf - Ferns