- Reference
- Pacific Sci. 392, figs 10, 11 (1955)
- Conservation Code
- Not threatened
- Naturalised Status
- Native to Western Australia
- Name Status
- Current
Scientific Description
Habit and structure. Thallus medium to dark green, with 1–16 axes arising from a rhizoidal holdfast. Axes 2–6 cm high, 2–4 mm thick, with a central siphon 0.5–1 mm broad with a thick lamellate wall, bearing close whorls of 10–12 branched laterals. Laterals with segments of 3 orders, di- to penta-chotomous; cross walls with open septa; primary segments clavate to pyriform, 400–700 µm long and 200–400 µm in diameter; secondary segments terete to slightly swollen, 450–700 µm long and 120–200 µm in diameter: tertiary segments clavate, 130–400 µm long and 100–130 µm in diameter; secondary and tertiary segments often lost; chloroplasts small, round.
Reproduction. Unknown.
Distribution. Only known from Point Fowler, Great Australian Bight, S. Aust., and from Hopetoun, W. Aust.
Habitat. On shallow sand covered rocks.
[After Womersley, Mar. Benthic Fl. Southern Australia I: 293–295 (1984)]