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Pacific Seaweeds

36 | Thumbnail Identification Guide

Branched and hardened (calcified)

Seaweeds branched consisting of hardened seg-ments, to 30 cm/12 in long, p. 81

Soft crusts

Seaweeds soft crusts lacking upright portions, to 50 cm/20 in in diameter, p. 89

Parasitic seaweeds

Seaweeds parasitic on other red algae, weakly pigmented, less than 7 mm/0.25 in at greatest dimension, p. 93

Filaments

Seaweeds thread-like or filamentous, less than 1 mm/0.04 in wide, p. 96

Solid or hollow cylinders

Seaweeds cylindrical, may be sparsely branched, 2 mm–3 cm/0.08–1.2 in wide, to 20 cm/8 in long, p. 106

Blades with regular bumps

Seaweeds bladed with pronounced bumps, no or little branching, to 1 m/3 ft long, p. 109

Blades with ribs and veins

Seaweeds bladed with conspicuous ribs, often branched, to 40 cm/16 in long, p. 114

Simple blades

Seaweeds bladed and simple, not repeatedly branched, to 1 m/3 ft long, p. 121

Branched in one plane, flattened

Seaweeds repeatedly branched mostly in one plane, flattened, to 40 cm/16 in long, p. 131

Bushy branched

Seaweeds repeatedly branched in all dimensions, bushy, to 50 cm/20 in long, p. 145