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NZ Plants
Asplenium shuttleworthianum - Shuttleworth's spleenwort
Sleenwort family: Aspleniaceae
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Frond
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 upper surface of rachis
L Jensen
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Frond, lower surface of rachis
L Jensen
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Rachis lower surface, scale
L Jensen
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Rachis scale detail
L Jensen
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Fertile frond
I MacDonald
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Fertile leaflets, upper surface
I MacDonald
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Fertile leaflets, sori with open sporangia
L Jensen
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Asplenium shuttleworthianum is a terrestrial fern with a short creeping stem (rhizome) and yellow-green leathery and lacy fronds.
Found in the Kermadec Islands in coastal cliffs and coastal scrub.
Vegetative characteristics |
Fertile frond and sporangia |
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Plant form: short, erect rhizome with fronds up to 900 mm in length |
Frond appearance: similar to sterile frond |
Frond stalk, midrib: grooved, scales with long filamentous tips |
Sporangium location: on lower frond surface |
Frond shape: elliptic |
Sporangium position: near tips of leaflets, close to margin |
Frond blade: 3-4-pinnate (divided 3-4x into leaflets or pinnae) |
Sporangia distribution: in groups (sori) |
Frond surface: leathery, hairless |
Sorus shape: linear |
Leaflets: linear to lanceolate, slightly expanded (spoon-shaped) |
Sorus covering: 2 mm long covering (indusium) opening toward midrib |
