Caulerpa cylindracea Sond.
Bot.Zeitung (Berlin) 3:50 (1845)

Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Distribution

Beard’s Provinces: Northern Province, South-West Province.

IBRA Regions: Dampierland, Geraldton Sandplains, Swan Coastal Plain.

IBRA Subregions: Geraldton Hills, Perth, Pindanland.

IMCRA Regions: Abrolhos Islands, Canning, Central West Coast, Kimberley, Leeuwin-Naturaliste, Pilbara (nearshore).

Local Government Areas (LGAs): Broome, Cockburn, Cottesloe, Fremantle, Greater Geraldton, Irwin, Karratha, Port Hedland, Rockingham, Wanneroo, Wyndham-East Kimberley.

Scientific Description
John Huisman and Cheryl Parker, Thursday 8 September 2016

Habit and structure. Thallus grass-green, spreading laterally to 50 cm, with naked stolons 1–2 mm diam. attached by short pillars with clustered rhizoids. Assimilators terete to slightly compressed, rarely branched, to 2–7 (–10) cm tall. Ramuli radially to ±distichously arranged (alternate to opposite), clavate, 4–6 mm long and 1–2 mm diam. near the apices, terete or slightly compressed.

Distribution. Occurs in Australia, Papua New Guinea and New Caledonia. In W.A. found south to Esperance.

Habitat. Epilithic or growing in sand. Invasive in the Mediterranean Sea and southern Australia..

[After Belton, Huisman & Gurgel, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 87 (2015)]