Adiantum pedatum


Sp. Pl.2: 1095. 1753

Common names: Northern maidenhair adiante du Canada
Synonyms: Adiantum pedatum Adiantum pedatum
Found in FNA Volume 2.
FNA2 P18 Adiantum pg 125.jpeg
Stems short-creeping; scales bronzy deep yellow, concolored, margins entire. Leaves lax-arching (rarely pendent), closely spaced, 40–75 cm. Petiole 1–2 mm diam., glabrous, occasionally glaucous. Blade fan-shaped, pseudopedate, 1-pinnate distally, 15–30 × 15–35 cm, glabrous; proximal pinnae 3–9-pinnate; rachis straight, glabrous, occasionally glaucous. Segment stalks 0.5–1.5(–1.7) mm, dark color entering into segment base. Ultimate segments oblong, ca. 3 times as long as broad; basiscopic margin straight; acroscopic margin lobed, lobes separated by narrow incisions 0–0.9(–1.1) mm wide; apex obtuse, divided into shallow, rounded lobes separated by shallow sinuses 0.1–2(–3.7) mm deep, margins of lobes crenulate or crenate-denticulate. Indusia transversely oblong, 1–3 mm, glabrous. Spores mostly 34–40 µm diam. 2n = 58.

Phenology: Sporulating summer–fall.
Habitat: Rich, deciduous woodlands, often on humus-covered talus slopes and moist lime soils
Elevation: 0–700 m


N.B., N.S., Ont., Que., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.


Once considered a single species across its range in North America and eastern Asia, Adiantum pedatum is considered to be a complex of at least three vicariant species (A. pedatum and A. aleuticum occur in North America) and a derivative allopolyploid species (C. A. Paris 1991). Adiantum pedatum in the strict sense is restricted to deciduous woodlands in eastern North America.



Facts about "Adiantum pedatum"
AuthorCathy A. Paris +
Common nameNorthern maidenhair + and adiante du Canada +
Elevation0–700 m +
HabitatRich, deciduous woodlands, often on humus-covered talus slopes and moist lime soils +
IllustratorJohn Myers +
PhenologySporulating summer–fall. +
ReferenceNone +
SynonymAdiantum pedatum +
Taxon nameAdiantum pedatum +
Taxon parentAdiantum +
Taxon rankspecies +
VolumeVolume 2 +