Class
Subclass
Order
Classification
Subordinate Taxa
Nomenclature
Scientific Name:
Onocleaceae Pic.Serm., Webbia 24: 708 (1970)
Type Taxon:
Description
Terrestrial ferns. Rhizomes long-creeping (NZ) or short-creeping to erect (not NZ), scaly. Fronds dimorphic, not articulated to rhizome. Sterile laminae pinnatifid to 1-pinnate-pinnatifid, catadromous, papery or herbaceous or coriaceous, glabrous or with very scattered scales and hairs. Fertile laminae 1–2-pinnate, blade greatly reduced, coriaceous. Veins free or reticulate, areoles without included veinlets. Sori round, on short receptacles, borne on abaxial surface, enclosed by inrolled pinna margins; paraphyses absent; indusia present or absent; sporangial maturation mixed. Sporangia with vertical annulus, usually 64 spores per sporangium. Homosporous; spores monolete, chlorophyllous; perispores with a few folds, minutely echinate.
Taxonomy
A family of four genera and five species (PPG 1 2016), previously included in Dryopteridaceae (Kramer 1990). Onocleaceae is sister to Blechnaceae and includes Matteucia, Onoclea, Onocleopsis and Pentarhizidium (Gastony & Ungerer 1997; Smith et al. 2006).
Recognition
The Onocleaceae includes terrestrial ferns with strongly dimorphic fronds. The sterile fronds are pinnatifid to 1-pinnate-pinnatifid, and the fertile fronds 1–2-pinnate, with greatly reduced blades. The sori are round and enclosed by the inrolled pinna margins. Spores are monolete and chlorophyllous.
Distribution
A family largely confined to north temperate regions but with one genus, Onocleopsis, extending into Mexico and Guatemala (Mickel & Smith 2004). The greatest diversity is found in China, with three genera and four species (Xing et al. 2013). One genus and species casual in New Zealand.
Biostatus
Exotic
| Category | Number |
|---|---|
| Exotic: Casual | 1 |
| Total | 1 |
Bibliography
Brownsey, P.J.; Perrie, L.R. 2020: Onocleaceae. In: Breitwieser, I. (ed.) Flora of New Zealand — Ferns and Lycophytes. Fascicle 28. Manaaki Whenua Press, Lincoln.
Gastony, G.J.; Ungerer, M.C. 1997: Molecular systematics and a revised taxonomy of the onocleoid ferns (Dryopteridaceae: Onocleeae). American Journal of Botany 84: 840–849.
Kramer, K.U. 1990: Dryopteridaceae. In: Kramer, K.U.; Green, P.S. Pteridophytes and gymnosperms. Vol. 1. In: Kubitzki, K. (ed.) The Families and Genera of Vascular Plants. Springer-Verlag, Berlin.
Mickel, J.T.; Smith, A.R. 2004: The Pteridophytes of Mexico. Memoirs of the New York Botanical Garden 88: 1–1054.
Pichi Sermolli, R.E.G. 1970: Fragmenta Pteridologiae II. Webbia 24: 699–722.
PPG 1 2016: A community-derived classification for extant lycophytes. Journal of Systematics and Evolution 54(6): 563–603.
Smith, A.R.; Pryer, K.M.; Schuettpelz, E.; Korall, P.; Schneider, H.; Wolf, P.G. 2006: A classification for extant ferns. Taxon 55(3): 705–731.
Xing, F.; Wang, F.; Kato, M. 2013: Onocleaceae. In: Zhengyi, W.; Raven, P.H.; Deyuan, H. (ed.) Flora of China. Lycopodiaceae through Polypodiaceae. Vol. 2–3. Science Press, Beijing.
