Dryopteris marginalis

(Linnaeus) A. Gray

Manual 632. 1848

Common names: Marginal wood fern dryoptère à sores marginaux
Basionyms: Polypodium marginale Linnaeus Sp. Pl. 2: 1091. 1753
Treatment appears in FNA Volume 2.
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Illustrator: John Myers
Leaves monomorphic, green through winter, 30–100 × 10–25 cm. Petiole 1/4–1/3 length of leaf, scaly at base; scales in dense tuft, pale tawny. Blade bluish green, ovate-lanceolate, pinnate-pinnatifid to 2-pinnate at base, leathery, not glandular. Pinnae ± in plane of blade, lanceolate; basal pinnae lanceolate, slightly reduced, basal pinnules longer than adjacent pinnules, basal basiscopic pinnule longer than basal acroscopic pinnule; pinnule margins shallowly crenate to nearly entire. Sori near margin of segments. Indusia lacking glands. 2n = 82.

Habitat: Rocky, wooded slopes and ravines, edges of woods, stream banks and roadbanks, and rock walls
Elevation: 50–1500 m

Distribution

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Greenland, N.B., Nfld., N.S., Ont., Que., Ala., Ark., Conn., Del., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.

Discussion

Dryopteris marginalis is an eastern North America endemic. Even though this species hybridizes with 10 other species, and some of these hybrids are fairly common, D. marginalis is not known to be involved in the formation of any fertile polyploid. Hybrids can be detected by malformed spores and the nearly marginal sorus position.

References

None.

Lower Taxa

No lower taxa listed.