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rosy maidenhair, rough maidenhair

Stems

short-creeping;

scales dark reddish brown, concolored, margins entire.

Leaves

arching, clustered, 20–37 cm.

Petiole

1–2 mm diam., adaxially hispid, not glaucous.

Blade

lanceolate, pinnate or occasionally pseudopedate, 1-pinnate distally, 12–18 × 6.5–8 cm;

proximal pinnae 1–4-pinnate;

indument of light-colored, sparse, multicellular hairs;

rachis straight, densely hispid, not glaucous.

Ultimate segments

oblong to long-triangular, ca. 2 times as long as broad, progressively reduced toward apex of penultimate divisions;

basiscopic margin oblique;

acroscopic margin of fertile segments crenulate, sterile segments sharply denticulate;

apex obtuse or acute.

False indusia

± round, 0.6–0.9 mm diam., covered with reddish brown, stiff, needlelike bristles.

Spores

mostly 40–60 µm diam.

Segment

stalks 0.2–0.3 mm, dark color generally entering into segment base.

Adiantum hispidulum

Phenology Sporulating summer–fall.
Habitat Banks and old walls
Elevation 0–100 m (0–300 ft)
Distribution
from FNA
CT; GA; Asia in s India; e Africa; Pacific Islands [Introduced in North America]
[BONAP county map]
Discussion

Adiantum hispidulum is represented by sporadic escapes from cultivation in the flora, possibly naturalized locally. It also has been reported from Florida and Louisiana.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 2.
Parent taxa Pteridaceae > Adiantum
Sibling taxa
A. aleuticum, A. capillus-veneris, A. jordanii, A. melanoleucum, A. pedatum, A. tenerum, A. tricholepis, A. viridimontanum
Name authority Swartz: J. Bot. (Schrader) 1800(2): 82. (1801)
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