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Deparia acrostichoides (Sw.) M. Kato  
Family: Athyriaceae
[Asplenium acrostichoides Sw., moreAsplenium acrostichoides var. thelypteroides (Michx.) Gilbert, Asplenium thelypteroides Michx., Athyrium acrostichoides (Sw.) Diels, Athyrium thelypterioides (Michx.) Desv., Athyrium thelypteroides f. acrostichoides (Sw.) Gilbert, Diplazium acrostichoides (Sw.) Butters, Diplazium thelypteroides (Michx.) Presl, Diplazium thelypteroides f. cristatum Neidorf, Diplazium thelypteroides f. serratum (G.Lawson) M.Broun, Lunathyrium acrostichoides (Sw.) Ching, Trichomanes acrostichoides (Sw.) Nieuwl.]
Deparia acrostichoides image
Paul Rothrock
  • FNA
  • Gleason & Cronquist
  • Resources
Masahiro Kato in Flora of North America (vol. 2)
Stems short-creeping. Petiole dark red-brown at base, straw-colored distally, 10--45 cm, swollen, with 2 rows of teeth; scales at base light brown, linear-lanceolate to lanceolate. Blade oblong-lanceolate, pinnate-pinnatifid, 30--80 × 12--25(--30) cm, narrowed to base, broadest near middle, acuminate at apex. Pinnae linear-oblong, base truncate, apex acuminate; segments oblong, margins entire to slightly lobed, apex round to slightly pointed. Costae and veins with multicellular hairs. Veins pinnate, lateral veins simple or 1-forked. Sori elongate, straight or hooked; indusia ± thick, margin ± entire. 2 n = 80. Damp woods, often on slopes; 30--1500 m; N.B., N.S., Ont., P.E.I., Que.; Ala., Ark., 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., S.C., Tenn., Vt., Va., W.Va., Wis. Deparia acrostichoides belongs to sect. Lunathyrium . Closely related Asian ferns have been treated as conspecific with Deparia acrostichoides , but D . acrostichoides differs from them in having creeping stems with rather distant leaves and pinnate-pinnatifid leaves. Deparia acrostichoides and Asian species such as D . pycnosora (H. Christ) M. Kato and D . allantodioides (Beddome) M. Kato are examples of vicariant species pairs with amphipacific disjunct distributions.

Vascular plants of NE US and adjacent Canada
Rhizome short-creeping, the lvs at the front end, 3.5-11 dm, the blade longer than the petiole, 13-22 cm wide, sharply acuminate, slightly reduced below, pinnate-pinnatifid, the rachis septate-hairy and sparsely scaly, pinnae 15-20 pairs below the pinnatifid tip, deeply pinnatifid, the costal wing 0.5-1 mm wide, the segments oblong, barely to strongly toothed, 6-13 נ3-6 mm; veins simple or forked, directed into the teeth; indusia 3-7 pairs per segment, light brown, firm, elongate, mostly 1.5-2 mm, straight or nearly so, seldom crossing the veins; 2n=80. Rich moist woods; N.S. and N.B. to Ont., and Minn., s. to Ga., La., and Okla. (Asplenium acrostichoides; Diplazium t.)

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.
Deparia acrostichoides
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Paul Rothrock
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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.