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Dryopteris cristata (L.) A. Gray  
Family: Dryopteridaceae
[Acrostichum callipteris (Ehrh.) Ehrh., moreAspidium cristatum (L.) Sw., Aspidium cristatum var. crenatum Christ, Aspidium lancastriense Spreng., Dryopteris affinis var. cristata (T. Moore) Fraser-Jenk., Dryopteris cristata var. lancastriensis (Spreng.) Tidestr., Dryopteris cristata var. mariana Tidestr., Filix cristata (L.) Farw., Filix-mas cristata , Lastrea callipteris (Ehrh.) Newm., Lastrea cristata (L.) Presl, Lastrea lancastriensis (Spreng.) J. Sm., Lophodium callipteris (Ehrh.) Newm., Nephrodium cristatum (L.) Michx., Nephrodium cristatum f. lancastriense (Spreng.) Gilbert, Nephrodium lancastriense (Spreng.) Desv., Polypodium callipteris Ehrh., Polystichum cristatum (L.) Roth, Tectaria cristata (L.) Lag., Garcia & Clem., Thelypteris cristata (L.) Nieuwl.]
Dryopteris cristata image
  • FNA
  • Gleason & Cronquist
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James D. Montgomery
Warren H. Wagner Jr. in Flora of North America (vol. 2)
Leaves dimorphic, 35--70 × 8--12 cm; fertile leaves dying back in winter; sterile leaves several, small, green through winter, forming 'rosette.' Petiole 1/4--1/3 length of leaf, scaly at least at base; scales scattered, tan. Blade green, narrowly lanceolate or with parallel sides, pinnate-pinnatifid, not glandular. Pinnae of fertile leaves twisted out of plane of blade and perpendicular to it, deltate; basal pinnae deltate, somewhat reduced, basal pinnules longer than adjacent pinnules, basal basiscopic pinnule and basal acroscopic pinnule equal; pinnule margins distantly serrate, with spiny teeth. Sori midway between midvein and margin of segments. Indusia lacking glands. 2 n = 164. Swamps, swampy woods, or open shrubby wetlands; 0--1200 m; Alta., B.C., Man., N.B., Nfld., N.S., Ont., P.E.I., Que., Sask.; Ala., Conn., Del., Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., Mont., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., Tenn., Vt., Va., W.Va., Wis.; Europe. Dryopteris cristata is believed to be an allotetraploid derived from D . ludoviciana and an unknown diploid called ' D . semicristata ' by W. H. Wagner Jr. (1971). This ancestral taxon could have been either North American or Eurasian and may have become extinct during the last glaciation (T. J. Carlson and W. H. Wagner Jr. 1982). Dryopteris cristata hybridizes with five species; these hybrids can be identified by the narrow blades and deltate proximal pinnae.

Vascular plants of NE US and adjacent Canada
Rhizome horizontal and short-creeping to somewhat ascending; lvs somewhat dimorphic, the deciduous fertile ones larger and more erect than the evergreen sterile ones; petiolar scales light brown, concolorous; fertile lvs mostly 3.5-8 dm, with mostly 10-25 pairs of pinnae, these 5-9 cm, to 2.5(-4) cm wide, the segments to 20 נ8 mm, often broadly confluent, the lowest pinnae reduced, broadly triangular, to about twice as long as wide; fertile pinnae twisted at an angle to the plane of the blade in life; sori midway between the midvein and the margin; sterile lvs half to three-fourths as long as the fertile; 2n=164. Marshes and wet woods; Nf. to Sask. and B.C., s. to N.C., Tenn., Io., Nebr., and Ida.; Eur.

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

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The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.