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NZ Plants
Hypolepis dicksonioides - giant hypolepis
Family: Dennstaedtiaceae
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Stem (rhizome) with young frond
L Jensen
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Network of branching rhizomes with frond stalks (stipes)
L Jensen
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Young frond with glandular hairs
L Jensen
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Young frond, stipe with glandular hairs
L Jensen
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Large, mature frond
L Jensen
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Frond midrib (rachis)
L Jensen
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Frond upper surface, rachis with leaflelts
L Jensen
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Frond upper surface, rachis and leaflet midribs
L Jensen
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Fertile frond lower surface, rachis with leaflets
L Jensen
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Fertile lealflets lower surface, hairs and marginal sori
L Jensen
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Marginal flap, sorus with unopened sporangia
L Jensen
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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 |
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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 |
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