- Kingdom: Plantae
- Phylum: Rhodophyta
- Class: Florideophyceae
- Order: Rhodymeniales
- Family: Lomentariaceae
- Scientific name: Lomentaria clavellosa
- Norwegian: vanlig rosenrør
The color is usually brown or pink or any shades in between. The 1-3 mm thick main stipe may reach a length of 40 cm and has alternate side branches.
It us usually founds on depths ranging from 2 to 20 meters.
It is widespread in the North Atlantic Ocean, as well as the Mediterranean and the Black Sea.