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NZ Plants

Asplenium lyallii - Lyall's spleenwort

Spleenwort family: Aspleniaceae

Asplenium lyallii is a terrestrial fern with a short, stout stem (rhizome) bearing narrow glossy green, thick and leathery erect fronds.
An endemic species found on limestone-rich soil and rock in drier coastal to subalpine areas throughout New Zealand.

Vegetative characteristics

Fertile frond and sporangia

Plant form: short, erect rhizome with fronds up to 400 mm

Frond appearance: similar to sterile frond

Frond stalk, midrib: scales narrowly triangular

Sporangium location: on lower frond surface

Frond shape: oval to elliptic

Sporangium position: close to leaflet margin

Frond blade: 1-2-pinnate (subdivided 1-2x into leaflets or pinnae)

Sporangia distribution: in groups (sori)

Frond surface: leathery, glossy, hairless

Sorus shape: linear

Leaflets: variable, ovate to oblong and from blunt to sharp tipped with smooth to toothed margins; stalked

Sorus covering: linear covering (indusium)  opening toward midrib