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NZ Plants
Asplenium hookerianum - Hooker's spleenwort
Spleenwort family: Aspleniaceae
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Plant
L Jensen
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Fronds, lower (left) and upper (right) surfaces
I MacDonald
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Frond stalk (stipe) with scales
L Jensen
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Frond upper surface, midrib (rachis) with leaflets
I MacDonald
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Frond rachis, scale
L Jensen
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Fertile leaflet, lower surface with sori containing ripe sporangia
L Jensen
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Leaflet lower surface with scales
L Jensen
View picture
Asplenium hookerianum is a terrestrial fern with short, erect stems bearing dark green, oval to elliptic fronds with rounded to very fine ultimate segments.
Found on the North (rare north of Auckland) and South Islands.
Vegetative characteristics |
Fertile frond and sporangia |
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Plant form: short, erect stem with fronds up to 250 mm |
Frond appearance: similar to sterile frond |
Frond stalk, midrib: brown to green with ovate scales |
Sporangium location: on lower frond surface |
Frond shape: lanceolate to elliptic |
Sporangium position: close to leaflet margin |
Frond blade: 2-3-pinnate (divided 2-3x into leaflets or pinnae) |
Sporangia distribution: in groups (sori) |
Frond surface: glossy, hairless |
Sorus shape: linear |
Leaflets: stalked; oval to linear; margins with shallow rounded teeth to deeply incised |
Sorus covering: linear covering (indusium) opening toward midrib |
