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Northern maidenhair fern

Photo: Dan Riley, CC BY 4.0, via iNaturalist · Walsingham, ON N0E 1X0, Canada, 2020-05-13

Grasses, sedges and ferns · Native to Quebec

Northern maidenhair fern

Adiantum pedatum Pteridaceae

Northern maidenhair fern has fan-shaped fronds held horizontally on slender, shining black stalks, with the leaflets arranged in a near-perfect circle. The fiddleheads emerge pinkish to burgundy in spring. It spreads slowly by a creeping rootstock into a loose colony. The fronds die back in fall and the plant is dormant, leaving bare ground, through winter.

Latin
Adiantum pedatum
L. · family Pteridaceae
English
Northern maidenhair fern
five-finger fern, northern maidenhair
French
Adiante du Canada
Kanien'kéha (Mohawk)
teyotisinahòn:tsi
okténtsi
The Greenbelt Indigenous Botanical Survey lists these names on its Maidenhair Fern entry, with the gloss 'they have black legs'. Its text is a shared page for several ferns, so the names are as shown on the maidenhair card and may be general terms.
Anishinaabemowin (Ojibwe)
naanaaganashk
mzise miijim
The Greenbelt Indigenous Botanical Survey gives naanaaganashk (-oon) as a general name for ferns and mzise miijim as a general name for fern. They are not specific to maidenhair fern. The Ojibwe People's Dictionary searches for fern and maidenhair returned no entries.

Through the year

Northern maidenhair fern in every season.

Story

The history of northern maidenhair fern.

Northern maidenhair fern grows in cool, moist, humus-rich woods across eastern North America, often on northern slopes and rocky seeps, and has a separate population in eastern Asia. It reproduces by wind-dispersed spores and is ranked secure by NatureServe. In Quebec it is native.

Carl Linnaeus described the species in 1753 in Species Plantarum. The genus name Adiantum refers to the dry look of the fronds when wet, and the common name comes from the slender, shining black stalks. The dark stems have been used in basketry, and the Greenbelt Indigenous Botanical Survey records that Katie Dybeau of Kahnawà:ke told F. W. Waugh about medicinal uses of the roots of several ferns including maidenhair.

Sources: Wikipedia: Adiantum pedatum · VASCAN: Adiantum pedatum · Lady Bird Johnson Wildflower Center: Adiantum pedatum · Greenbelt Indigenous Botanical Survey: Ferns

Characteristics

The plant at a glance.

Height30 to 75 cm
Spread45 to 75 cm, slowly widening
HabitDeciduous fern with horizontal, fan-shaped fronds on black stalks
Bloom timeNone; reproduces by spores
FrondsFine, fan-like, pinkish to burgundy fiddleheads in spring, then bright green
SporesBorne under rolled-over margins of the leaflet tips; released in late summer
HardinessZone 3
LightPart shade to shade
MoistureConsistently moist; does not tolerate drying out
Spread behaviourSlowly spreading by a creeping rootstock into a clump
Native rangeEastern North America from Quebec and Ontario to Georgia and Oklahoma; also eastern Asia and coastal Alaska
Quebec statusNative

In the Flight Path Garden

Where it grows here.

ZonesHügelkultur Garden
How many10
Planted2023

It brings fine, airy texture to shady corners of the garden, and it is a true woodland native that suits the cool, moist, humus-rich pockets here.

Wildlife

Who uses it.

  • The dense fronds give shade and cover for toads and other small ground animals.
  • Ferns of this kind are generally not browsed by deer.
  • The plant spreads by spores, and its fronds shelter woodland insects at the soil surface.

Sources: Lady Bird Johnson Wildflower Center: Adiantum pedatum

Care

What to do, season by season.

Spring

Cut back any winter-damaged fronds and let the pink fiddleheads unfurl. Divide the rhizome in early spring if a clump needs to be shared.

Summer

Keep the soil evenly moist and mulched with leaf mould. Fronds scorch quickly in dry heat or afternoon sun.

Fall

Leave the fronds to fall and feed the soil. Water well before freeze-up if the autumn is dry.

Winter

Fully dormant and hardy under snow. A leaf-mulch layer helps in winters with little snow cover.

Relations

Knowledge and use.

The Greenbelt Indigenous Botanical Survey records that Katie Dybeau of Kahnawà:ke informed F. W. Waugh about medicinal uses of the roots of cinnamon, Christmas, maidenhair and sensitive ferns. The dark stems have also been used in basketry.

Source: Greenbelt Indigenous Botanical Survey: Ferns · Lady Bird Johnson Wildflower Center: Adiantum pedatum