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NZ Plants

Hypolepis millefolium- thousand-leaved fern

Family: Dennstaedtiaceae

Hypolepis millefolium is distinctive for its broad, finely dissected bright green fronds with numerous bristly hairs. Deciduous in winter.
An endemic fern found at higher elevations on the North Island to sea level on the South island.

Vegetative characteristics

Fertile frond and sporangia

Plant form: creeping rhizome with fronds up to 950 mm in length

Frond appearance: similar to sterile fronds

Frond stalk, midrib: bristly hairs

Sporangium location: lower frond surface

Frond shape: narow elliptic

Sporangium position: leaflet margin

Frond blade: 4-pinnate at base (divided up to 4x into leaflets or pinnae)

Sporangia distribution: in groups (sori)

Frond surface: hairs along midrib veins

Sorus shape: round to oval

Leaflets: deeply cut; attached along leaflet base (adnate)

Sorus covering: uncovered or covered with a reflexed marginal flap