Classification
Class
Polypodiopsida
Subclass
Polypodiidae
Order
Polypodiales Link
Family
Dryopteridaceae Herter
Genus
Dryopteris Adans.
 Nomenclature
Scientific Name:
Dryopteris sieboldii (van Houtte ex Mett.) Kuntze, Revis. Gen. Pl. 2, 813 (1891)
Synonymy:
  • ≡ Aspidium sieboldii van Houtte ex Mett., Fil. Hort. Bot. Lips. 87, t. 20, f. 1-4 (1856)
Type: Japan, Siebold (not located).
Etymology:
Named in honour of Philipp Franz von Siebold (1796–1866), a German physician and botanist who lived, worked and collected in Japan from 1823 to 1830.
 Recognition

Dryopteris sieboldii is a very distinct species with an erect rhizome and 1-pinnate, broadly oblong or broadly ovate, coriaceous laminae. There are up to four pairs of stalked, narrowly elliptic, entire pinnae tapering to acuminate apices, and a similar terminal pinna. The laminae are glabrous adaxially, with a few scattered scales abaxially. The sori are arranged in 3–4 irregular rows either side of the costae (Hoshizaki & Moran 2001; Zhang 2012; Wu et al. 2013).

 Distribution

North Island: Volcanic Plateau.

Altitudinal range: c. 300 m.

Collected once as a spontaneous occurrence in a garden near Rotorua.

Occurs naturally in China and Japan (Wu et al. 2013).

Dryopteris sieboldii distribution map based on databased records at AK, CHR & WELT. Image: K.Boardman © Landcare Research 2020 CC BY 4.0
Dryopteris sieboldii distribution map based on databased records at AK, CHR & WELT. Image: K.Boardman © Landcare Research 2020 CC BY 4.0
 Habitat

Recorded as self-sown on a crib wall near to cultivated parent plants.

 Biostatus
Exotic
 First Record

Heenan et al. (2008). Voucher AK 299456, 2006.

 Images
Dryopteris sieboldii. Herbarium specimen of self-sown plant from Rotorua, AK 300493, showing fertile frond with sori arranged in irregular rows either side of costae. Image: Auckland Museum © Auckland Museum All rights reserved
Dryopteris sieboldii. Herbarium specimen of self-sown plant from Rotorua, AK 300493, showing fertile frond with sori arranged in irregular rows either side of costae. Image: Auckland Museum © Auckland Museum All rights reserved
 Bibliography
Brownsey, P.J.; Perrie, L.R. 2021: Dryopteridaceae. In: Breitwieser, I. (ed.) Flora of New Zealand — Ferns and Lycophytes. Fascicle 31. Manaaki Whenua Press, Lincoln.
Heenan, P.B.; de Lange, P.J.; Cameron, E.K.; Parris, B.S. 2008: Checklist of dicotyledons, gymnosperms, and pteridophytes naturalised or casual in New Zealand: additional records 2004–06. New Zealand Journal of Botany 46: 257–283.
Hoshizaki, B.J.; Moran, R.C. 2001: Fern Grower’s Manual. Timber Press, Portland, Oregon.
Kuntze, C.E.O. 1891: Revisio Generum Plantarum. Vol. 2. Arthur Felix, Leipzig.
Mettenius, G.H. 1856: Filices Horti Botanici Lipsiensis. Leopold Voss, Leipzig.
Wu, S.; Xiang, J.; Lu, S.; Wang, F.; Xing, F.; Dong, S.; He, H.; Zhang, L.; Barrington, D.S.; Christenhusz, M.J.M. 2013: Dryopteris. In: Zhengyi, W.; Raven, P.H.; Deyuan, H. (ed.) Flora of China. Lycopodiaceae through Polypodiaceae. Vol. 2–3. Science Press, Beijing.
Zhang, X. 2012: Lycophytes and ferns of China. Peking University Press, Beijing.