Classification
Class
Polypodiopsida
Subclass
Polypodiidae
Order
Polypodiales Link
Family
Athyriaceae Alston
Genus
Deparia Hook. & Grev.
 Subordinate Taxa
 Nomenclature
Scientific Name:
Deparia petersenii (Kunze) M.Kato, Bot. Mag. (Tokyo) 90: 37 (1977)
Synonymy:
  • ≡ Asplenium petersenii Kunze, Analecta Pteridogr. 24 (1837)
  • ≡ Diplazium petersenii (Kunze) Christ, Bull. Acad. Int. Géogr. Bot. 1902: 245 (1902)
  • ≡ Athyriopsis petersenii (Kunze) Ching, Acta Phytotax. Sin. 9: 66 (1964)
  • ≡ Lunathyrium petersenii (Kunze) H.Ohba, Sci. Rep. Yokosuka City Mus. 11: 53 (1965)
Lectotype (selected by Sledge 1977): China, Canton, C.W. Petersen, 1827, C 10016377 (!online)
Etymology:
Named in honour of C.W. Petersen, who collected the type specimen.
Vernacular Name(s):
Japanese lady fern
 Taxonomy

Kato (1984) recognised three subspecies within Deparia petersenii: subsp. petersenii, widespread from the Himalayas to south-east Asia; subsp. deflexa, occurring in Malaya, Sumatra, and Java; and subsp. congrua, distributed from Australia and the Solomon Islands to the Marquesas Islands. Subsp. congrua occurs throughout much of New Zealand, but subsp. petersenii has been collected only once as a rare escape, and subsp. deflexa is unknown here.

 Key
1Lamina thick and brittle, often with blue-green iridescence on the adaxial surface; primary pinnae divided about half-way to costasubsp.petersenii
Lamina thin and pliable, never with blue-green iridescence on the adaxial surface; primary pinnae divided to c. 1 mm from the costasubsp.congrua
 Biostatus
Indigenous (Non-endemic)
Number of subspecific taxa in New Zealand within Deparia petersenii (Kunze) M.Kato
CategoryNumber
Indigenous (Non-endemic)1
Exotic: Casual1
Total2
 Bibliography
Brownsey, P.J.; Perrie, L.R. 2018: Athyriaceae. In: Breitwieser, I.; Wilton, A.D. (ed.) Flora of New Zealand — Ferns and Lycophytes. Fascicle 24. Manaaki Whenua Press, Lincoln.
Brownsey, P.J.; Smith-Dodsworth, J.C. 2000: New Zealand ferns and allied plants. Edition 2. David Bateman, Auckland.
Ching, R. 1964: On some confused genera of the family Athyriaceae. Acta Phytotaxonomica Sinica 9: 41–84.
Christ, H. 1902: Filices Bodinierianae, déterminées et décrites. Bulletin de l’Académie Internationale de Géographie Botanique 1902: 189–274.
Kato, M. 1977: Classification of Athyrium and allied genera of Japan. Botanical Magazine (Tokyo) 90: 23–40.
Kato, M. 1984: A taxonomic study of the Athyrioid fern genus Deparia with main reference to the Pacific species. Journal of the Faculty of Science, University of Tokyo, Section III. Botany 13: 375–429.
Kunze, G. 1837: Analecta Pteridographica. Leopold Voss, Leipzig.
Ohba, H. 1965: Considerations on the genus Lunathyrium in Japan (1). Science Report of the Yokosuka City Museum 11: 48–55 (in Japanese).