Dryopteris celsa

(W. Palmer) Knowlton

W. Palmer, & Pollard, Proc. Biol. Soc. Wash. 13: 202. 1900.

Common names: Log fern
Endemic
Basionym: Dryopteris goldiana subsp. celsa W. Palmer Proc. Biol. Soc. Wash. 13: 65. 1899
Treatment appears in FNA Volume 2.

Leaves monomorphic, dying back in winter, 65–120 × 15–30 cm. Petiole 1/3 length of leaf, scaly at least at base; scales scattered, dark-brown or tan with dark central stripe. Blade green, ovatelanceolate, gradually tapering to tip, pinnate-pinnatifid, herbaceous, not glandular. Pinnae ± in plane of blade, lanceolate-ovate; basal pinnae linear-oblong, much reduced, basal pinnules longer than adjacent pinnules, basal basiscopic pinnule and basal acroscopic pinnule equal; pinnule margins crenately toothed. Sori midway between midvein and margin of segments. Indusia lacking glands. 2n = 164.


Habitat: Seepage slopes, hammocks and logs in swamps, mostly on the Piedmont and Coastal Plain
Elevation: 50–800 m

Distribution

V2 221-distribution-map.gif

Ala., Ark., Del., Ga., Ill., Ky., La., Md., Mich., Mo., N.J., N.Y., N.C., Pa., S.C., Tenn., Va., W.Va.

Discussion

Dryopteris celsa is a fertile allotetraploid derived from hybridization between D. goldieana and D. ludoviciana. Dryopteris celsa hybridizes with six species; hybrids can usually be identified by the dark-striped scales.

Selected References

None.

Lower Taxa

None.

"not" is not a number. "swollen" is not a number.

... more about "Dryopteris celsa"
James D. Montgomery +  and Warren H. Wagner Jr. +
(W. Palmer) Knowlton +
Dryopteris goldiana subsp. celsa +
simple to commonly +
pinnate-pinnatifid;tapering;ovatelanceolate +
reduced +
roundish +
Log fern +
Ala. +, Ark. +, Del. +, Ga. +, Ill. +, Ky. +, La. +, Md. +, Mich. +, Mo. +, N.J. +, N.Y. +, N.C. +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
50–800 m +
often +  and glabrous +
Seepage slopes, hammocks and logs in swamps, mostly on the Piedmont and Coastal Plain +
caducous +  and persistent +
round-reniform +
monomorphic +
65cm;120cm +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
1/3 length of leaf +
1/4 +  and 2/3 +
not articulate +
not +, spinulose +  and serrate +
sessile +  and petiolulate +
inequilateral +
enlarged +  and reduced +
W. Palmer, & Pollard, Proc. Biol. Soc. Wash. +
round +, cuplike +, hoodlike +, reniform +, falcate +  and linear +
2 (?) +  and 3 (?) +
tan;dark-brown +
persistent +
linear;ovate +
discrete +
reniform +  and oblong +
dictyostelic +, unbranched +  and branched +
short-creeping +  and erect +
Dryopteris celsa +
Dryopteris +
species +
anastomosing +  and simple +
epiphytic +  and hemiepiphytic +