Compressed perennial stalk (stipe) with teeth, arising from simple disc-conical holdfast. Lower branches (perennial laterals) start simple and become divided in an even pattern (pinnate) and have a thickened mid rib through centre only. Multiple stems (stipes) are compressed with laterals arising on them directly. Secondary laterals (upper laterals/ramuli) arise from stems in two vertical rows and are twisted at their base facing downward to base (retroflex). Upper laterals arise radially from secondary lateral axes which become cylindrical, and are divided (pinnate) with fine thread-like (filiform) branchlets (ramuli). Vesicles (when reproductive) are large, oval, attached by a short stem (petiole), and have either no protrusion or a slender-compressed protrusion (mucro). Dark to medium brown. Up to 50 cm long (thallus).
This species has been renamed from Sargassum to Phyllotricha.
Subtidal rocky reefs and tidal pools, to depth of 38 m.
Photosynthetic - sunlight
Native to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed