Sargassum fusiforme

Thallus thick-fleshy, 0.2–1 m high, yellow brown. Main axis cylindrical, 1 cm long, 3–4 mm diam. Primary axes cylindrical bearing short cylindrical branchlets of various sizes in whorls from all sides. Phylloids shortly stalked, long, without midrib, with entire margins, commonly filiform, linear-spathulate, clavate, ovate. Vesicles shortly stalked, fusiform with mucronate apices. Receptacles stalked, cylindrical, simple or branched, 5–15 mm long, with obtuse apices, crowded in axils of phylloids Attachment by well-developed fibrous holdfast.

China, Hong Kong, Japan, Korea.