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NZ Plants

Hypolepis dicksonioides - giant hypolepis

Family: Dennstaedtiaceae

Hypolepis dicksonioides is a robust fern with a long-creeping horizontal stem (rhizome bearing large fronds with a conspicuous covering of bristly and glandular hairs on the stalk (stipe) and lower frond surface. Sori are protected by reflexed marginal flaps.
Found on Raoul Island and locally on the North Island and northern portion of the South Island favouring forest margins and disturbed ground.

Vegetative characteristics

Fertile frond and sporangia

Plant form: creeping rhizome with fronds up to 1 m in length

Frond appearance: similar to sterile fronds

Frond stalk, midrib: brown with glandular and non-glandular, bristly hairs

Sporangium location: lower frond surface

Frond shape: broadly ovate to broadly elliptic

Sporangium position: leaflet margin

Frond blade: 4-5-pinnate (divided up to 5x  into leaflets or pinnae)

Sporangia distribution: in groups (sori)

Frond surface: glandular and bristly hairs on veins of lower surface

Sorus shape: round to oval

Leaflets: rounded ,veins not joined; attached along leaflet base (adnate)   

Sorus covering: strongly reflexed marginal flap