Beard’s Provinces: Eremaean Province, Northern Province.
IBRA Regions: Carnarvon, Dampierland, Pilbara.
IBRA Subregions: Cape Range, Pindanland, Roebourne.
IMCRA Regions: Abrolhos Islands, Canning, Kimberley, Ningaloo, Pilbara (nearshore), Pilbara (offshore).
Local Government Areas (LGAs): Ashburton, Broome, Exmouth, Greater Geraldton, Karratha, Wyndham-East Kimberley.
Habit and structure. Thallus greyish green to dark green, spreading laterally to 25–30 cm, with smooth terete stolons 1.5–3.0 mm diam., attached to the substratum by a stalked rhizoidal system. Rachis branched or unbranched, to 6 cm tall, segmented, basally with a short terete annulate stalk, distally pinnate. Each segment bearing 2 opposite, clavate to cylindrical ramuli 4–7 mm long and (1–) 2–3 (–4) mm wide [L:B 1.5–4 (–5)], not overlapping, each with a slight basal constriction. Apices of assimilators and ramuli rounded.
Distribution. Known from scattered localities in northern Australia. In W.A. south to Albany.
Habitat. Occurs on rocky and sandy shores, usually anchored in sediment, generally in the shallow subtidal down to a depth of 5 m.
[After Belton, Huisman & Gurgel, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 82 (2015)]
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/