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NZ Plants

Asplenium shuttleworthianum - Shuttleworth's spleenwort

Sleenwort family: Aspleniaceae

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

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