Classification
Class
Polypodiopsida
Subclass
Polypodiidae
Order
Polypodiales Link
Family
Dryopteridaceae Herter
Genus
Dryopteris Adans.
 Nomenclature
Scientific Name:
Dryopteris erythrosora (D.C.Eaton) Kuntze, Revis. Gen. Pl. 2, 812 (1891)
Synonymy:
  • ≡ Aspidium erythrosorum D.C.Eaton in Perry, Narr. Exped. China Japan 2, 330 (1856)
Holotype: Simoda, Japan, C. Wright, 1853–1856, US 0135342 (!online)
Etymology:
From the Latin erythrosorus (with red sori), a reference to the colour of the sori in this species.
 Recognition

Dryopteris erythrosora has an erect to short-creeping rhizome, 2-pinnate ovate laminae, and narrowly ovate blackish-brown scales on the stipe. Young fronds are often red-tinged. The scales on the costae are inflated, with long, attenuate apices. The sori are arranged in one row either side of the costae, and the reniform indusia characteristically have red centres (Hoshizaki & Moran 2001).

 Distribution

North Island: Northland.

Altitudinal range: c. 80 m.

Collected as an escape from cultivation in Kerikeri.

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

Dryopteris erythrosora distribution map based on databased records at AK, CHR & WELT. Image: K.Boardman © Landcare Research 2020 CC BY 4.0
Dryopteris erythrosora 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 near to a cultivated parent plant.

 Biostatus
Exotic
 First Record

Heenan et al. (2008). Voucher AK 288162, 2004.

 Images
Dryopteris erythrosora. Adaxial surface of primary pinnae showing red-tinged margins. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Adaxial surface of primary pinnae showing red-tinged margins. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Abaxial surface of primary pinna showing indusia with red centres. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Abaxial surface of primary pinna showing indusia with red centres. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Abaxial surface of secondary pinnae showing tiny, inflated scales on the costa, and indusia with red centres. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Abaxial surface of secondary pinnae showing tiny, inflated scales on the costa, and indusia with red centres. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Dark brown, narrowly ovate scales on the stipe. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Dark brown, narrowly ovate scales on the stipe. Image: L.R. Perrie © Leon Perrie CC BY-NC 3.0 NZ
Dryopteris erythrosora. Herbarium specimen of cultivated plant from Manurewa, AK 228913, showing 2-pinnate frond with sori arranged in one row either side of costae. Image: Auckland Museum © Auckland Museum All rights reserved
Dryopteris erythrosora. Herbarium specimen of cultivated plant from Manurewa, AK 228913, showing 2-pinnate frond with sori arranged in one row 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.
Hobbs, J.; Hatch, T. 1994: Bulbs for New Zealand Gardens. Godwit Press, Auckland.
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.
Perry, M.C. 1856: Narrative of the expedition of an American squadron to the China Seas and Japan. Beverley Tucker, Senate Printer, Washington.
Steele, R.; Lowe, M. 2002–2006: Index. Subtropicals Index: 1–12.
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.