- Reference
- Syn.Alg.Scand. 21 (1817)
- Conservation Code
- Not threatened
- Naturalised Status
- Native to Western Australia
- Name Status
- Current
Scientific Description
Habit and structure. Thallus erect, pale to dark brown, to 30 cm tall, dichotomously to alternately branched. Axes flattened, 2–10 mm wide, with a prominent midrib. Marginal serrations generally conspicuous, but in some specimens poorly developed. Lower axes often denuded. Hair tufts in 2 rows on either side of the midrib. Sporangia scattered, solitary or in small groups, in narrow elongate bands, parallel to and close to the midrib. Hair bundles not surrounded by sporangia. Tetrasporangia dark brown, ovoid to spherical, 110–160 µm diam. in surface view, embedded in the thallus.
Distribution. Known from Ningaloo Reef, near Exmouth, W.A., across northern Australia to Magnetic Island, Qld. Also in the Seychelles, India, Sri Lanka and Indonesia.
Habitat. Generally epilithic in the shallow subtidal.
[After Huisman & Phillips, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 200 (2015)]
Distribution
- IBRA Regions
- Carnarvon, Pilbara.
- IBRA Subregions
- Cape Range, Roebourne.
- IMCRA Regions
- Canning, Kimberley, Ningaloo, North West Shelf, Pilbara (nearshore), Pilbara (offshore).
- Local Government Areas (LGAs)
- Ashburton, Broome, Derby-West Kimberley, Exmouth, Karratha, Wyndham-East Kimberley.