- ≡ Dicksonia davallioides R.Br., Prodr. Fl. Nov. Holland. 158 (1810)
- ≡ Sitobolium davallioides (R.Br.) J.Sm., London J. Bot. 1: 434 (1842)
Dennstaedtia davallioides has long-creeping rhizomes; fronds 800–2000 mm long; stipes black-brown proximally, chestnut-brown to yellow-brown distally, 340–650 mm long; laminae deeply 3-pinnate-pinnatifid or 4-pinnate, broadly ovate or broadly elliptic, 400–1350 mm long; the longest primary pinnae 400–600 mm long and 200–300 mm wide. The abaxial surfaces of the rachis and costae bear sparse, colourless or pale brown, multicellular, non-glandular hairs up to 0.5 mm long. The indusia are slightly bivalvate, formed from a true inner lobed indusium and outer modified inrolled lamina flap, attached at the base, lacking hairs.
North Island: Auckland.
Altitudinal range: 40 m.
Known from the University of Auckland campus and from Whenuapai in Auckland, and from the Arapuni Gorge near Te Awamutu, as an escape from cultivation.
Occurs naturally in Australia (Queensland, New South Wales, Victoria); naturalised in South Australia (Brownsey 1998), and has the potential to spread aggressively by spores and its creeping rhizomes (Heenan et al. 1998).
Recorded as widely scattered in an overgrown garden and spreading through a fence into the adjacent property at Whenuapai, and amongst Clivia plantings at the University of Auckland campus. Its habitat in the Arapuni Gorge is unknown.
Heenan et al. (1998, p. 158). Voucher AK 231458, 231698, 1997.
A diploid chromosome count of n = c. 29 was reported for this species from Australia (Tindale & Roy 2002).