Halidrys siliquosa

Halidrys siliquosa is a large marine brown algae.

Halidrys siliquosa herbarium sheet. Collected in Heligoland, Germany

Halidrys siliquosa
A fresh piece of Halidrys siliquosa lying in a tray, with some other seaweeds
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Stramenopiles
Phylum:	Ochrophyta
Class:	Phaeophyceae
Order:	Fucales
Family:	Sargassaceae
Genus:	Halidrys
Species:	H. siliquosa
Binomial name
Halidrys siliquosa (Linnaeus) Lyngbye

Description

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]

Halidrys siliquosa cross-section

Reproduction

The plants are hermaphroditic,^[2] bearing bisexual conceptacles appearing as pods on stalks at the end of branches.^[1]

Distribution

Generally found around Ireland, Great Britain - including Shetland and the Isle of Man.^[1][3]

Habitat

Low level, low littoral, rock pools.^[1]