Gary Fewless
Key to the Ferns
| 57. Mature blades 15-18 cm broad; basal (lowest)
pinnae roughly triangular, broadest at the base, (i.e deltate). |
Drypteris clintoniana |
| 57. Mature blades 20-30 cm broad; basal pinnae ovate, narrowing to the base. | Dryopteris goldiana |
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