Page:Ferns and Evergreens New England.djvu/5

Key to Ferns (Filices).

1. Stem not forked.

2. (a)

   Simple leaf-like, feather-like parted, or twice parted ................................................................................................................................................................................................................................................................................................................................................................................................

   Plate I.

3. (b)

   Feather-like divided ................................................................................................................................................................................................................................................................................................................................................................................................

   Plate II.

4. (c)

   Feather-like divided and parted:

5. narrow ................................................................................................................................................................................................................................................................................................................................................................................................

   Plate II.

6. less than 2 ft. long ................................................................................................................................................................................................................................................................................................................................................................................................

   Plate III.

7. 2 ft. or more long ................................................................................................................................................................................................................................................................................................................................................................................................

   Plates IV., V.

8. (d)

   Twice feather-like divided ................................................................................................................................................................................................................................................................................................................................................................................................

   Plates VI.

9. (e)

   Twice divided and parted, at least the lower leaflets ................................................................................................................................................................................................................................................................................................................................................................................................

   Plates VI., VII., VIII.

10. (f)

    Three times divided, at least the lower leaflets ................................................................................................................................................................................................................................................................................................................................................................................................

    Plate IX.

11. Stem two-forked. Ferns ................................................................................................................................................................................................................................................................................................................................................................................................

    Plate X.

12. Evergreens or Club-mosses ................................................................................................................................................................................................................................................................................................................................................................................................

    Plate XI.