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NZ Plants
Hypolepis ambigua
Family: Dennstaedtiaceae
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Frond
I MacDonald
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Frond stalk (stipe) with hairs
L Jensen
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Stipe hair detail
L Jensen
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Frond upper surface, rachis bearing leaflets
L Jensen
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Midrib of primary leaflet, upper surface with secondary and tertiary leaflets
L Jensen
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Leaflet, upper surface
L Jensen
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Leaflet, hair detail
L Jensen
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Midrib of primary leaflet, lower surface with secondary and tertiary leaflets
L Jensen
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Leaflet margin flap, sorus with unopened sporangia
L Jensen
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Hypolepis ambigua is a fern with a slender horizontal stem (rhizome) bearing fronds covered in pale brown, bristly hairs. Sori are slightly protected by marginal flaps.
An endemic fern found in lowland to lower montane areas in the North Island and coastal and lowland areas of the South Island.
Vegetative characteristics |
Fertile frond and sporangia |
|---|---|
Plant form: creeping rhizome with fronds up to 120 c m in length |
Frond appearance: similar to sterile fronds |
Frond stalk, midrib: red-brown to yellow-brown with bristly hairs |
Sporangium location: lower frond surface |
Frond shape: broadly ovate to broadly ovate |
Sporangium position: leaflet margin |
Frond blade: 3-4-pinnate (divided up to 4x into leaflets or pinnae) |
Sporangia distribution: in groups (sori) |
Frond surface: bristly hairs on veins of lower surface |
Sorus shape: round to oval |
Leaflets: rounded ,veins not joined; attached along leaflet base (adnate) |
Sorus covering: slightly reflexed marginal flap |
