Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
1 Leaf blades broadly triangular in outline, about as broad as long, subcoriaceous; sori linear, confluent; [subfamily Hypolepidoideae]
..2 Leaves 3-4-pinnate-pinnatifid; indusium flap-like; [subfamily Hypolepidoideae]
....3 Leaves 1.5-2.5 m long, 3-pinnate, dark green; [of FL]
....3 Leaves < 1 m long, 2-pinnate-pinnatifid, yellow-green; [of SC, GA, and AL northwards]