Adiantum formosum R.Br.

Black Stem

Prodr. 155 (1810) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v)

Rhizome creeping, coarse, covered with scales. Fronds well separated, erect, 60–100 cm long. Stipe long, relatively stout, purplish-brown to black, polished, slightly roughened, scaly near base. Lamina broadly triangular, 3–4-pinnate, dark green, moderately firm, glabrous; rachises dark brown to black, minor rachises with short, curved, reddish-brown hairs. Pinnae shortly stalked, distant; pinnules short stalked at corners, sub-rhomboidal, asymmetric, 5–15 mm long, 2–6 mm wide, lower margins almost straight and entire, upper margins rounded, shallowly or deeply lobed, scalloped or toothed. Sori 4–8, relatively small, in shallow depessions of lobes, covered by broadly half-moon shaped to oblong reflexed leaf flap.

EGL, EGU. Also Qld, NSW. New Zealand. In Victoria, confined to a few river flats and moist rainforest slopes of the lower Snowy, Brodribb and Cann Rivers in East Gippsland but locally rather common.

Source: Entwisle, T.J. (1994). Ferns and allied plants (Psilophyta, Lycopodiophyta, Polypodiophyta). In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
order Polypodiales
family Pteridaceae
genus Adiantum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Adiantum formosum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Adiantum formosum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
East Gippsland Lowlands present native
East Gippsland Uplands present native

State distribution

Distribution map
New South Wales
Australian Capital Territory