Classification
 Nomenclature
Scientific Name:
Pteris multifida Poir., Encycl. 5, 714 (1804)
Synonymy:
Type: a plant of unknown origin cultivated at the Jardin des Plantes, Paris, P (n.v.; see Roux 2009).
Etymology:
From the Latin multifidus (much divided), a reference to the division of the lamina in this species.
 Recognition

In New Zealand, Pteris multifida has an erect to short-creeping, scaly rhizome; rhizome scales narrowly ovate, shiny brown, concolorous. Fronds ± dimorphic; sterile fronds to 250 mm long, fertile fronds 180–370 mm long. Stipes pale green to yellow-brown, 50–175 mm long. Rachises winged for most or all of its length. Sterile laminae up to 130 mm long and 60 mm wide, pinnatifid distally, pinnate-pinnatifid proximally, with the primary pinnae divided almost to the midrib into a single pair of secondary pinnae arising on both sides of the primary pinnae; secondary pinnae up to 35 mm long and 9 mm wide, margins irregularly serrate, apices acuminate. Fertile laminae broadly elliptic or broadly ovate, up to 220 mm long and 150 mm wide, pinnatifid distally, pinnate-pinnatifid proximally with the primary pinnae divided almost to the midrib into 1 or 2 pairs of secondary pinnae arising on both sides of the primary pinnae; secondary pinnae up to 80 mm long and 5 mm wide, margins entire or serrate distally, apices acuminate. Veins free. Sori continuous along margins of ultimate segments.

 Distribution

North Island: Auckland.

Altitudinal range: 20–40 m.

Recorded from a few places in Auckland and Hamilton.

Occurs naturally in China, Taiwan, Japan, South Korea, Philippines, Thailand, Vietnam (Liao et al. 2013). Naturalised in Uganda (Roux 2009).

 Habitat

Recorded growing from cracks in a horizontal pine log in a carpark, and on moss-covered concrete block walls.

 Biostatus
Exotic
 First Record

New record. Voucher AK 305834, WELT P023358, 2009.

 Bibliography
Brownsey, P.J.; Perrie, L.R. 2021: Pteridaceae. In: Breitwieser, I. (ed.) Flora of New Zealand — Ferns and Lycophytes. Fascicle 30. Manaaki Whenua Press, Lincoln.
Liao, W.; Ding, M.; Wu, Z.; Wu, S.; Prado, J.; Gilbert, M.G. 2013: Pteris. In: Zhengyi, W.; Raven, P.H.; Deyuan, H. (ed.) Flora of China. Lycopodiaceae through Polypodiaceae. Vol. 2–3. Science Press, Beijing.
Poiret, J.L.M. 1804: Encyclopédie méthodique. Botanique. Vol. 5. Panckoucke, Paris.
Roux, J.P. 2009: Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23: 1–296.