Beard’s Provinces: Eremaean Province.
IBRA Regions: Carnarvon.
IBRA Subregions: Cape Range.
IMCRA Regions: Kimberley, Pilbara (offshore).
Local Government Areas (LGAs): Ashburton, Karratha, Wyndham-East Kimberley.
Habit and structure. Thallus erect, to 9 cm tall, olive-green to grass-green, tufted, with a rhizoidal base. Primary axes 30–200 μm diam. Branching irregular, most axes with uniseriate lateral branches, these alternate or often opposite, 15–20 μm diam. Cells transversely and longitudinally aligned throughout, although often displaced, 10–35 μm diam. in surface view, each with 2–10 pyrenoids <3.5 µm diam. Reproductive thalli with fertile distal regions; cytoplasm of cells rounding and forming 5–7 zoids.
Distribution. Widespread in Australian seas (at least).
Habitat. Epiphytic or epilithic in the intertidal and shallow subtidal.
[After Huisman, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 28 (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/