Halidrys siliquosa is a large marine brown algae.
Halidrys siliquosa is a large brown alga growing to a length of 120 centimetres (47 in). The fronds are somewhat flattened, tough and leathery. They and less than 1 cm broad. The branches occur alternately arranged in one plane. Air bladders occur and are oblong and pointed. The plants are attached by a discoid holdfast.[1]
The plants are hermaphroditic,[2] bearing bisexual conceptacles appearing as pods on stalks at the end of branches.[1]
Generally found around Ireland, Great Britain - including Shetland and the Isle of Man.[1][3]
Low level, low littoral, rock pools.[1]
Halidrys siliquosa is a large marine brown algae.
Halidrys siliquosa herbarium sheet. Collected in Heligoland, Germany
