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Green Seaweeds | 61

Identifying Pacific Seaweeds

Prasiola (short sea lettuce) p. 61

Ulva (sea lettuce) p. 62

Ulvaria / Kornmannia / Monostroma (dark sea lettuce) p. 64

Prasiola Short sea lettuce

Class Trebouxiophyceae Order Prasiolales Family Prasiolaceae

Number of Species

More than 30 species of Prasiola (Greek=green) are found worldwide, 5 locally: P. linearis, P. crispa, P. borealis, P. delicata and P. meridionalis.

Description

Prasiola is a very small bladed seaweed, at most a few centimetres in length and usually one cell thick. Tufts of these blades resemble little cabbages.

Prasiola can tolerate and exploit high-nitrogen conditions that most plants would find toxic. Mike Guiry (University College, Galway, Ireland) described the distribution of this group in Galway as being associated with telephone poles

Prasiola sp. and a convenient source of nitrogen, in Santa Cruz, CA.