Beard’s Provinces: South-West Province.
IBRA Regions: Swan Coastal Plain.
IBRA Subregions: Perth.
IMCRA Regions: Leeuwin-Naturaliste, Pilbara (nearshore).
Local Government Areas (LGAs): Cockburn, Karratha.
Habit and structure. Thallus grass-green to olive-green, spreading laterally to 10–20 cm, with smooth terete stolons to 0.5 mm diam., attached to the substratum by rhizoidal clusters and small inconspicuous pillars. Assimilators with short basal terete stalks to 1 mm long, then flattened, simple and ligulate, to 1.5 cm tall and 3–4 mm wide, generally of uniform width or tapering slightly distally, with smooth margins or occasionally with spines and rounded or notched apices. Ramuli absent.
Distribution. Known from tropical and warmer seas of the Indian and western Pacific Oceans. Reported as invasive in Florida, U.S.A. In W.A., it occurs south to Cape Naturaliste.
Habitat. Grows on sand and rock in the subtidal.
[After Belton, Huisman & Gurgel, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 92 (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/