Beard’s Provinces: South-West Province.
IBRA Regions: Esperance Plains.
IBRA Subregions: Recherche.
IMCRA Regions: Central West Coast, Leeuwin-Naturaliste, WA South Coast.
Local Government Areas (LGAs): Cockburn, Coorow, Dandaragan, Esperance, Rockingham.
Habit and structure. Thallus firm, dark green, applanate, lobed, closely adherent, to 1 cm thick and to 15 cm across. Utricles in clusters, (45–)50–100(–130) µm in diameter at apex and slightly to markedly constricted just below apex, 400–800(–1200) µm long; utricle wall at apex slightly to markedly (up to 65 µm) thickened, internally often pitted; hairs (or scars) common on older utricles. Medullary filaments 12–35 µm in diameter, without plugs.
Reproduction. Gametangia fusiform, 60–125 µm in diameter, 210–360 µm long.
Distribution. From Port Denison, W. Aust., around southern and eastern Australia to Redcliffe, Qld., and the north coast of Tas.
Habitat. Occurs in the lower eulittoral and uppermost sublittoral on rough-water to moderate coasts.
[After Womersley, Mar. Benthic Fl. Southern Australia I: 227–228 (1984)]
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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/