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Claytosmunda claytoniana subsp. claytoniana   (redirected from: Osmunda claytoniana L.)
Family: Osmundaceae
[Osmunda basilaris Spreng., moreOsmunda claytoniana L., Osmunda claytoniana f. tomentosa Neidorf, Osmunda claytoniana var. dubia Grout in Gilbert, Osmunda interrupta Michx., Osmunda monticola Wall., Plenasium claytonianum (L.) C.Presl, Plenasium interruptum (Michx.) Presl, Struthiopteris claytoniana (L.) Bernh.]
Claytosmunda claytoniana subsp. claytoniana image
Morton Arboretum
  • FNA
  • Gleason & Cronquist
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R. David Whetstone
T. A. Atkinson in Flora of North America (vol. 2)
Leaves pinnate-pinnatifid; petioles ca. 1/3 length of blades, winged, with light brown hairs, becoming glabrate. Sterile leaves elliptic to oblong, ca. 0.5--1 m; pinnae broadly oblong, lacking persistent tuft of hairs at base; ultimate segments with base truncate, margins entire, apex rounded. Fertile leaves with greatly reduced, sporangia-bearing medial pinnae that wither early, giving appearance of no middle pinnae (hence the vernacular name, interrupted fern). Sporangia greenish, turning dark brown. 2 n =44. Sporulation early spring--midsummer; 0--2300 m; St. Pierre and Miquelon; Man., N.B., Nfld., N.S., Ont., P.E.I., Que.; Conn., 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.; Asia Osmunda claytoniana is sparingly cultivated as an ornamental.

Vascular plants of NE US and adjacent Canada
Much like no. 2 [Osmunda cinnamomea L.]; lvs soft, dull blue-green, foreshortened and blunt at the tip, as also the individual pinnae; rachis soon glabrate; segments of the sterile pinnae slightly hairy but not ciliate; outer lvs usually sterile, the inner larger and with 1-5 pairs of fertile pinnae near the middle of the blade; fertile pinnae to 6 נ2 cm, much smaller than the vegetative ones above and below; sporangia dark brown; 2n=44. Open, moist woods and margins of swamps, in subacid or neutral soil; Nf. to Ont. and Minn., s. to Ga., Tenn., and Ark.; e. Asia. Ours is var. claytoniana. A hybrid with no. 1 is O. زuggii R. M. Tryon.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Claytosmunda claytoniana subsp. claytoniana
Open Interactive Map
Claytosmunda claytoniana subsp. claytoniana image
Paul Rothrock
Claytosmunda claytoniana subsp. claytoniana image
Morton Arboretum
Claytosmunda claytoniana subsp. claytoniana image
Morton Arboretum
Claytosmunda claytoniana subsp. claytoniana image
Morton Arboretum
Claytosmunda claytoniana subsp. claytoniana image
Morton Arboretum
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
Claytosmunda claytoniana subsp. claytoniana image
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The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.