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Green Seaweeds | 53

Identifying Pacific Seaweeds

Class Siphonocladophyceae Order Cladophorales Family Cladophoraceae

Number of Species

Rhizoclonium (Greek=root) contains 30 species and forms. Locally, this genus is represented by one species, R. lubricum; however, the distinction between Rhizoclonium and other unbranched green filaments, like Chae-tomorpha, is ripe for study. This species was formerly known by the more suggestive name Lola lubrica.

Description

Rhizoclonium lubricum is an unbranched and usually unattached filament. Its multinucleate cells are invisible to the naked eye and its overall look and feel are reminiscent of green fishing line. Plants are usually in excess of 20 cm (8 in) long.

Habitat & Distribution

Rhizoclonium lubricum is often found in wave-sheltered waters, entangled with other attached seaweeds in the mid- to lower intertidal region, from BC to central California.

Urospora Hanic’s green barrels

Urospora sp. Photo by Gary Saunders