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Identifying Pacific Seaweeds

Thumbnail Identification Guide | 35

Unbranched Filaments

Filament unbranched throughout, to 1 cm/0.4 in diameter, see Filaments, p. 51

Branched Filaments

Filament branches at least once, may be regular or irregular branching, to 1 cm/0.4 in diameter, see Filaments, p. 55

Blades

Seaweeds leaf-like, 2 mm–50 cm/0.08–20 in wide,p. 60

Cylinders

Seaweeds hollow tubes or cylinders, 2 mm–5 cm/ 0.08–2 in wide, 2 cm–50 cm/0.75–20 in long, p. 66

Spongy texture

Seaweeds spongy in texture, crusts and branched forms, to 50 cm/20 in in greatest dimension, p. 68

Unicellular forms

Seaweeds green dots, very small unicells in other seaweeds and animals, or in water causing pea soup-like appearance of tide pools, p. 70

red Seaweeds

Seaweeds yellowish to red to pink to purple, or, if hardened or calcareous, pink to purple, p. 74

Hard crusts (calcified)

Seaweeds crusts lacking upright portions, 2 mm–1 m/0.08 in–3 ft in diameter, p. 76