Halosaccion glandiforme

High intertidal sea sac

Authority: (S.G.Gmelin) Ruprecht

Thallus to ~6 cm (2.4 in) tall and ~1.5 cm (0.6 in) in diameter, but often shorter, the hollow sac expands gradually from a narrow stipe to a rounded tip, which may be slightly broader or narrower than the middle of the sac.

Habitat

Occurring singly, in clusters, or more commonly in extensive patches on high intertidal north-facing bedrock.

North Pacific Distribution

Aleutian Islands to Cook Inlet, Alaska; Russia

Former scientific names

Ulva glandiformis, Dumontia hydrophora

Similar taxa

This species was confused with Halosaccion fucicola for many years. The latter species usually occurs in the mid to low intertidal on rock, other algae, or invertebrates.