Subordinate Taxa
Scientific Name:
Rumohra Raddi, Opusc. Sci. 3: 290, t. 12, f. 1 (1819)
Type Taxon:
Rumohra aspidioides Raddi
Named in honour of Karl von Rumohr Holstein (1785–1843), a German patron of the arts and sciences.

Terrestrial or epiphytic, evergreen ferns. Rhizomes long-creeping or climbing, scaly. Rhizome scales non-clathrate, ovate or narrowly ovate, margins entire or minutely toothed, attached at base or peltate, concolorous, pale to dark brown. Fronds monomorphic, not bulbiferous. Stipes and rachises scaly, adaxially sulcate. Laminae 2–3-pinnate, coriaceous, scaly. Veins free. Sori round, borne on abaxial surface, away from the margin, in 1 row either side of midrib; indusia round, peltate. Spores monolete; perispores coarsely rugose or tuberculate, smooth on the surface.


A genus of seven species included in the subfamily Elaphoglossoideae (Bauret et al. 2017).

Rumohra is considered to be monophyletic, and sister to Megalastrum, with the two genera together sister to Lastreopsis sens. str. (Labiak et al. 2014).

Only one widespread species, Rumohra adiantiformis, is present in New Zealand.


In New Zealand, the sole species of Rumohra is distinguished by its terrestrial or climbing habit, long-creeping rhizomes, 2–3-pinnate scaly fronds, and round sori protected by round indusia. The spores are coarsely rugose or tuberculate, and smooth on the surface (Large & Braggins 1991).


Rumohra is a small genus of seven species, with three endemic to Madagascar, one to Juan Fernandez Island, and two to Brazil. One species is widespread in tropical and south temperate regions from South and Central America to Africa, Madagascar, Australasia, New Guinea and the South Pacific (Sundue et al. 2013; Labiak et al. 2014; Bauret et al. 2017). One non-endemic species in New Zealand.

Indigenous (Non-endemic)
Number of species in New Zealand within Rumohra Raddi
Indigenous (Non-endemic)1

The base chromosome number in Rumohra is x = 41 (Kramer 1990).

Bauret, L.; Rouhan, G.; Hirai, R.Y.; Perrie, L.; Prado, J.; Salino, A.; Senterre, B.; Shepherd, L.; Sundue, M.; Selosse, M.-A.; Gaudeul, M. 2017: Molecular data, based on an exhaustive species sampling of the fern genus Rumohra (Dryopteridaceae), reveal a biogeographical history mostly shaped by dispersal and several cryptic species in the widely distributed Rumohra adiantiformis. Botanical Journal of the Linnean Society 20: 1–19.
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.
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.
Kramer, K.U.; Green, P.S. 1990: Pteridophytes and gymnosperms. Kubitzki, K. (ed.) The Families and Genera of Vascular Plants. Vol. 1. Springer-Verlag, Berlin.
Labiak, P.H.; Sundue, M.; Rouhan, G.; Hanks, J.G.; Mickel, J.T.; Moran, R.C. 2014: Phylogeny and historical biogeography of the lastreopsid ferns (Dryopteridaceae). American Journal of Botany 101: 1207–1228.
Large, M.F.; Braggins, J.E. 1991: Spore atlas of New Zealand ferns and fern allies. SIR Publishing, Wellington.
Raddi, G. 1819: Synopsis filicum Brasiliensium. Opuscoli Scientifici 3: 279–294.
Sundue, M.; Hirai, R.Y.; Prado, J. 2013: Rumohra glandulosissima (Dryopteridaceae) a new species from the Atlantic rainforest, and revision of the species occurring in Brazil. Systematic Botany 38: 915–924.