Taxonomy
- Doodia aspera R.Br. is a species of fern in the family Blechnaceae.
- The specific epithet aspera derives from Latin, meaning “rough,” a reference to the texture of the frond surface.
- Molecular phylogenetic studies have led some taxonomists to incorporate the genus Doodia into Blechnum, treating the species under the name Blechnum asprum (R.Br.) S. J. Harr. However, both nomenclatures are in current use in botanical literature.
Description
- D. aspera is a small to medium‑sized terrestrial fern.
- It possesses a short, creeping rhizome from which arise erect fronds.
- Fronds are dimorphic: sterile fronds are broader and relatively shorter, whereas fertile fronds are more narrowly elongated.
- The lamina is pinnate to bipinnate, with a leathery texture that can feel slightly rough to the touch, supporting the species epithet.
- Sori are linear, arranged along the margins of the frond segments and are typically covered by a reflexed edge of the lamina (a characteristic feature of many blechnoid ferns).
Distribution and habitat
The species is endemic to eastern Australia.
- Recorded occurrences include coastal and sub‑coastal regions of New South Wales and southeastern Queensland.
- It occupies moist, shaded environments such as forest understories, gullies, and near streams, often on acidic, sandy to loamy soils.
Ecology
Like other ferns, D. aspera reproduces via spores released from the marginal sori.
*The species contributes to the understory vegetation structure and provides microhabitat for invertebrates.
Conservation status
*The conservation status of Doodia aspera has not been listed as threatened on the Australian Government’s Environment Protection and Biodiversity Conservation Act (EPBC) list. Regional assessments consider it to be of “Least Concern,” reflecting its relatively stable populations within its known range.
References
- Australian Plant Census. (2023). Doodia aspera R.Br. Retrieved from the Australian Virtual Herbarium.
- Wilson, K.L. (2011). Blechnaceae in Flora of Australia (Vol. 49). Australian Biological Resources Study.
- PPG I. (2016). A higher-level classification of fern families and genera. Taxon, 65(5), 1053–1108.
Note: Taxonomic interpretations may vary among sources, and nomenclatural updates continue as phylogenetic research progresses.