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NZ Plants
Blechnum parrisiae - pukupuku, rasp fern
Hard fern family: Blechnaceae
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Plant
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Frond
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Young and old fronds
L Jensen
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Frond upper surface, midrib (rachis) and leaflets
L Jensen
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Frond upper surface, rachis with leaflets
L Jensen
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Frond upper surface, rachis with hairs
L Jensen
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Rachis hair detail
L Jensen
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Fertile leaflet, upper surface
L Jensen
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Fertile leaflet upper surface, margin with teeth
L Jensen
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Leaflet, lower surface, sori with indusium covering sporangia
L Jensen
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Sorus, indusium covering sporangia
L Jensen
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Blechnum parrisiae is a small fern with a short erect stem bearing similar fertile and sterile fronds that are reddish when young and rough and raspy when mature.
A fern occurring on the Kermadec Islands, the North Island and offshore islands and on the South Island forming extensive colonies in exposed areas.
Formerly known as Doodia australis.
Vegetative characteristics |
Fertile frond and sporangia |
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Plant form: an erect stem bearing stiff, harsh fronds up to 600 mm long |
Frond appearances: similar to sterile fronds |
Frond stalk, midrib: scales present on frond stalk (stipe) and midrib (rachis) |
Sporangium location: on lower frond surface |
Frond shape: narrowly elliptic to linear |
Sporangium position: leaflet margin |
Frond blade: pinnate (divided 1 x into leaflets or pinnae) |
Sporangium distribution: in groups (sori) |
Frond surface: harsh, fine hairs |
Sorus shape: linear, discrete,sometimes running together |
Leaflets: oblong shape, tip rounded to pointed; lower ones stalked, the middle and upper attached along their base (adnate) |
Sorus covering: linear covering (indusium) opening toward midrib |
