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NZ Plants
Blechnum zeelandicum
Hard fern family: Blechnaceae
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Plant
L Jensen
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Fertile frond (left) and sterile frond (right)
L Jensen
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Frond stalk (stipe) with scales and hairs
L Jensen
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Sterile frond upper surface, midrib (rachis) and leaflets
L Jensen
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Sterile frond upper surface, rachis
L Jensen
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Sterile frond, rachis with hairs and scales
L Jensen
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Rachis hair detail
L Jensen
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Fertile frond upper surface, rachis with leaflets
L Jensen
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Fertile frond lower surface, rachis and leaflets with sori
L Jensen
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Young sori with indusium coverings
L Jensen
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Sorus with glandular hairs
L Jensen
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Blechnum zeelandicum is a small fern bearing prostrate sterile fronds with short, broad leaflets. The fronds are erect with widely-spaced, narrow lateral leaflets and a long terminal leaflet up to 1/2 the length of the entire frond.
An endemic fern occurring in local populations in the Kermadec Islands, and on the North Island.
Formerly known as Doodia squarrosa.
Vegetative characteristics |
Fertile frond and sporangia |
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Plant form: an erect stem bearing stiff, harsh fronds up to 500 mm long |
Frond appearance: narrower and longer than sterile with more narrow, linear leaflets; terminal leaflet up to 1/8 length or entire frond |
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, often running together |
Leaflets: oblong shape, bluntly pointed; lower and middle ones stalked, the upper attached along their base (adnate) |
Sorus covering: linear covering (indusium) opening toward midrib |
