Gary Fewless
Key to the Ferns
| 4. Fertile and sterile fronds arising separately
from a rhizome or caudex; mature sterile fronds longer than 50 cm. Do
not mistake some species of Botrychium, which produce a separate
fertile branch near ground level. Careful examination will reveal that
they are not separate fronds, and the blades are mostly shorter than 30
cm. |
5. |
| 4. Fertile portions borne as a separate branch or distinct portion of an otherwise sterile blade. | 7. |
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