Dennstaedtia punctilobula

(Michaux) T. Moore

Index Fil. 97. 1857

Common names: Hay-scented fern dennstaedtie à lobules ponctués
Basionyms: Nephrodium punctilobulum Michaux Fl. Bor.-Amer. 2: 268. 1803
Treatment appears in FNA Volume 2.
Stems long-creeping, 2–3 mm diam. Leaves clustered, erect, 0.4–1(–1.3) × 0.1–0.3 m. Petiole straw-colored to brown, darker at base, dull, ca. 1/2 length of blade, pubescent with soft, jointed hairs. Blade yellow-green or pale green, dull, lanceolate, 2-pinnate-pinnatifid, ca. 3 times as long as wide, base slightly narrowed but truncate, apex acuminate, with soft, silver-gray, jointed hairs on both surfaces. Basal segments of pinnules opposite; ultimate segments ovate to lanceolate, base equilateral, truncate, margins deeply lobed, serrate-crenate. Sori globose to almost cylindric; indusia tubular to cylindric. Spores trilete, globose with low, tuberculate, distal face and equatorial flange. 2n = 68.

Phenology: Sporulates in summer.
Habitat: Rocky slopes, meadows, woods, stream banks, and roadsides, in acid soils
Elevation: 0–1200 m


V2 821-distribution-map.gif

N.B., Nfld., N.S., Ont., P.E.I., Que., Ala., Ark., Conn., Del., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.


Reports of occurrences of Dennstaedtia punctilobula in Iowa are based on incorrectly labeled specimens collected in Massachusetts (T. S. Cooperrider 1968). Dennstaedtia punctilobula spreads aggressively in open woods and clearings.

Selected References


Lower Taxa


AuthorClifton E. Nauman + and A. Murray Evans +
Authority(Michaux) T. Moore +
BasionymsNephrodium punctilobulum +
Common nameHay-scented fern + and dennstaedtie à lobules ponctués +
DistributionN.B. +, Nfld. +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, Ga. +, Ill. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Vt. +, Va. +, W.Va. + and Wis. +
Elevation0–1200 m +
HabitatRocky slopes, meadows, woods, stream banks, and roadsides, in acid soils +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
PhenologySporulates in summer. +
Publication titleIndex Fil. +
Publication year1857 +
ReferenceNone +
Source xml grained fna xml/V2/V2 821.xml +
Taxon familyDennstaedtiaceae +
Taxon nameDennstaedtia punctilobula +
Taxon parentDennstaedtia +
Taxon rankspecies +
VolumeVolume 2 +