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NZ Plants
Davallia tasmanii - Three Kings Davallia
Family: Davalliaceae
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Sterile frond
I MacDonald
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Sterile frond upper surface, leaflets and rachis
I MacDonald
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Sterile frond upper surface, rachis
L Jensen
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Sterile frond lower surface, leaflets and rachis
I MacDonald
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Sterile frond lower surface, rachis
L Jensen
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Fertile frond
L Jensen
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Fertile frond lower surface, leaflets with sori
I MacDonald
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Pouch-like sori with open sporangia
L Jensen
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Davallia tasmanii is a terrestrial fern with a creeping stem (rhizome) with deltoid yellow-green and leathery fronds. Each group of sporangia (a sorus) is inside a distinctive pouch-like covering (indusium) making this an easy fern to identify.
An endemic fern found on the Three Kings Islands.
Vegetative characteristics |
Fertile frond and sporangia |
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Plant form: creeping with fronds up to 200 mm long |
Frond appearance: similar to sterile frond |
Frond stalk, midrib: smooth |
Sporangium location: on lower frond surface |
Frond shape: broadly ovate to 5-angled |
Sporangium position: within a pouch near leaflet margin |
Frond blade: 3-4-pinnate (subdivided 3-4 x into leaflets or pinnae) |
Sporangia distribution: in groups (sori) |
Frond surface: leathery |
Sorus shape: oblong |
Leaflets: oblong, incised or toothed |
Sorus covering: oblong covering (indusium) attached at base and sides to form a pouch |
