Corallina officinalis

Thallus bushy, calcareous, articulated, issuing from heavily calcified crust tightly attached to the substratum, 5–9 cm high, rose-, grayish-purple to almost white. Branching is irregular, di-, trichotomous. Segments at low portion cylindrical (2–4 mm long) or roundish (to 3 mm diam.), above cylindrical, slightly compresssed, to 10 mm long, with white apices. Hemispherical conceptacles develop laterally on segments Growing in the low intertidal and upper subtidal zones, on rocks, stones and shells in exposed and semi-protected habitats.

North America, China (Yellow Sea), Japan (Hokkaido and Honshu Islands), Korea, Russia (along all Far Eastern coasts), Australia and New Zealand.