Sargassum pallidum

Thallus coarse, leathery, yellowishbrown to olive, bushy, (0.3)-2.0-2.5 m high. Main axis cylindrical, 20-30 cm high, 0.5-1.0 cm diam. giving rise to primary branches bearing secondary branches with branchlets. Primary branches terete, three-edged, to 2 m long, arranged bilaterally alternate. At the basal portion, phylloids large, leathery, broadly-lanceolate or ovoid, to 10 cm long, with midrib and entire or toothed margins. In the upper portion, phylloids small, lanceolate, linear-lanceolate to linear, without midrib. Vesicles stalked, spherical, subspherical or obovate, develop commonly in the middle portion of the thallus. Plant dioecious, receptacles cylindrical, racemose, develop in axils of linear branchlets. Holdfast discoid. Growing on stony bottom, in lower intertidal, upper subtidal, in sheltered and open shores.

Subtropical and temperate latitudes of Pacific Ocean.