Halidrys siliquosa (L.) Lyngbye
Skolmetang in Norwegian
Sea oak in English
The species Halidrys siliquosa belongs to:
Photos of Halidrys siliquosa (1):
1 of 1: Part of thallus
Note: Thallus can be up to 2 m tall, the axes are somewhat flattened and lack midrib. It has irregular or alternating branching. The gas vesicles (some indicated by arrows) sit on short stalks, are elongated and divided in compartments ("pea pod structure). It is common in the upper part of the subtidal and in rock pools, and has a stunted form in rock pools. It is monoicous and fertile during spring and early summer.