Codium laminarioides Harv.
Trans.Roy.Irish Acad. 565 (1855)

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

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Jarrah Forest, Swan Coastal Plain.

IBRA Subregions: Perth, Southern Jarrah Forest.

IMCRA Regions: Central West Coast, Leeuwin-Naturaliste.

Local Government Areas (LGAs): Augusta-Margaret River, Busselton, Cockburn, Coorow, Cottesloe, Dandaragan, Irwin, Joondalup, Perth, Rockingham.

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

Habit and structure. Thallus medium green, with a short, terete stipe (to 12 mm long) expanding to a flat, felt-like frond 1.5–2 mm thick, to 80 cm broad and 40 cm long, simple or once furcate, irregularly lobed. Utricles 65–200(–290) µm in diameter below apex, 470–800 µm long; apices rounded, thickened to 30 µm and lamellate; hairs (or scars) common. Medullary filaments 20–55 µm in diameter, much slenderer than utricle base, with prominent plugs adjacent to utricle base.

Reproduction. Gametangia elongate-ovoid to cylindrical, 40–90 µm in diameter, 170–250 µm long, 1–4 per utricle, borne on a slight protuberance from utricle.

Distribution. From Port Denison, W. Aust., to Pearson I., S. Aust.

Habitat. Usually a deep water species, collected from shallow areas (often in shade) to 30 m deep.

[After Womersley, Mar. Benthic Fl. Southern Australia I: 232–234 (1984)]