- Reference
- Pacific Sci. 43:226, 231 (footnote) (1989)
- Conservation Code
- Not threatened
- Naturalised Status
- Native to Western Australia
- Name Status
- Current
Scientific Description
Habit and structure. Thallus forming tufts 2–3 mm tall; holdfast of descending rhizoids from lower cells. Erect filaments sparingly to richly branched, with percurrent primary axes bearing lateral branches c. every 5–8 cells, but with numerous adventitious lateral branches arising on intercalary cells. Lateral branches with basal meristems, distally with tapering colourless filaments. Cells of primary axes 25–45 (–60) µm diam. [L:B to 1.2], but mostly narrower due to intercalary cell divisions; cells subtending lateral branches narrower than those above and below. Cells of lateral branches 25–40 µm diam. near basal meristem [L:B 0.5–1.0], tapering to 7–8 µm diam. at apices [L:B to 10]. Plurilocular sporangia sessile, borne adaxially on lower cells of lateral branches, below the meristem, solitary or in groups of up to 3 sequentially maturing sporangia, somewhat conical, tapering to a 1 (–2)-celled apex, 85–110 µm long and 25–50 µm wide.
Distribution. Known from tropical and subtropical regions of the western Atlantic, northern Indian and western Pacific Oceans.
[After Huisman, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 171 (2015)]