Contact Us
Log in
Sandbox Portal
Use for testing only
Home
Search Collections
Map Search
Checklists
Image Search
Data Use
About Symbiota
Sitemap
Help
Dryopteris intermedia
(Muhl. ex Willd.) A. Gray
Family:
Dryopteridaceae
[
Dryopteris spinulosa var. intermedia
(Muhl. ex Willd.) Underw.]
Flora of North America
Resources
James D. Montgomery
Warren H. Wagner Jr. in Flora of North America (vol. 2)
Leaves monomorphic, green through winter, 32--90 × 10--20 cm. Petiole 1/3 length of leaf, scaly at least at base; scales scattered, tan. Blade green, ovate, 3-pinnate-pinnatifid, herbaceous, glandular. Pinnae ± in plane of blade, lanceolate-oblong; basal pinnae lanceolate, not reduced, basal pinnules longer than adjacent pinnules, basal basiscopic pinnule longer than basal acroscopic pinnule; pinnule margins serrate, teeth spiny. Sori midway between midvein and margin of segments. Indusia with minute glandular hairs. 2 n = 82. Moist rocky woods, especially hemlock hardwoods, ravines, and edges of swamps; 0--2000 m; N.B., Nfld., N.S., Ont., P.E.I., Que.; Ala., Conn., Del., Ga., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., W.Va., Wis. A related taxon, Dryopteris intermedia subsp. maderensis (J. Milde ex Alston) Fraser-Jenkins, occurs on eastern Atlantic islands.
Open Interactive Map
Click to Display
50 Total Images