Gary Fewless
Key to the Ferns
| 54. Lower basal pinnule of lowest pinna more
than twice as long as upper basal pinnule of lowest pinna. |
Dryopteris expansa |
| 54. Lower basal pinnule of lowest pinna less
than twice as long as upper basal pinnule of lowest pinna. |
Dryopteris carthusiana |
| Return to start of fern key |