Deparia acrostichoides

(Swartz) M. Kato

Ann. Carnegie Mus. 49: 177. 1980

Common names: Silvery-spleenwort silvery glade fern athyrie fausse-thélyptère
Basionyms: Asplenium acrostichoides Swartz J. Bot. (Schrader) 1800(1): 54. 1800
Synonyms: Athyrium acrostichoides (Swartz) Diels Athyrium thelypterioides (Michaux) Desvaux Diplazium acrostichoides (Swartz) Butters
Treatment appears in FNA Volume 2.
Click plate for higher resolution version.
Illustrator: John Myers
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. 2n = 80.

Habitat: Damp woods, often on slopes
Elevation: 30–1500 m

Distribution

V2 473-distribution-map.gif

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.

Discussion

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.

References

None.

Lower Taxa

No lower taxa listed.