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NZ Plants

Asplenium hookerianum - Hooker's spleenwort

Spleenwort family: Aspleniaceae

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

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