Siphonocladus tropicus (P.Crouan & H.Crouan) J.Agardh
Algern.Syst. 105 (1887)

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


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

Local Government Areas (LGAs): Ashburton, Cockburn, Dandaragan, Exmouth, Greater Geraldton, Karratha.

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

Habit and structure. Thallus erect, to 4–5 cm tall, with numerous cylindrical axes arising from the base, attached by non-septate rhizoids. Axes to 3 mm diam., with basal annular constrictions. Lateral branches formed from protoplasts of the parent branch, these rounding up and forming irregularly radial protrusions along the parent branch which grow to a length of 1–2 cm. All branches with rounded apices.

Distribution. A common tropical species. In W.A. south to Rottnest Island.

Habitat. Epilithic in the intertidal and subtidal.

[After Huisman & Leliaert, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 64 (2015)]