IMCRA Regions: Kimberley, Pilbara (nearshore), Pilbara (offshore).
Local Government Areas (LGAs): Ashburton, Karratha, Wyndham-East Kimberley.
Habit and structure. Thallus to 7 cm high, pale pink to grey, lightly calcified, subdichotomously branched; dichotomies 6–11 mm apart; segments slightly rounded at both ends. Branches terete, 1.5–2.0 mm in diameter, glabrous. Cortex with 3 or 4 layers of cells; innermost cells inflated and colourless, grading to smaller pigmented outer cortical cells.
Reproduction. Monoecious or dioecious. Spermatangial cavities 300–350 µm in diameter; spermatangia 6–8 × 4–6 µm. Carpogonial branch basal cell with 4 or 5 small-celled branches; hypogynous cell with 3 or 4 branches of nutritive cells. Cystocarps spherical to slightly flattened, 400–500 µm in diameter. Gonimoblast filaments partially lining pericarp base. Carposporangia 45–65 × 26–40 µm. Paraphyses 3- or 4-celled, projecting from inner face of the pericarp.
Distribution. Occurs from the Dampier Archipelago, W. Aust., probably around northern Australia to Qld.
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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/