Phylum: Rhodophyta

Class: Rhodophyceae

Order: Rhodymeniales

Family: Rhodymeniaceae

Halosaccion glandiforme (Gmelin) Ruprecht

Description: This plant is erect, up to 30 cm. high, generally in clusters, yellowish brown, olive brown, or reddish purple in colour, attached to the substrate by a small discoid holdfast. The erect portion is an elongate hollow sac, up to 4 cm. in diameter, tapering abruptly to a narrow stipitate region below, and broadly rounded at the apex. The hollow saccate region is filled with water.

Habitat: On rocks in the middle intertidal zone.

Pacific Coast Distribution: Alaska to Mexico.

Robert Scagel, 1972

H. glandiforme shown with Ulva lactuosa	H. glandiforme growing on gooseneck barnacles	H. glandiforme with E. muricata and barnacles
A dense H. glandiforme field	H. glandiforme showing banding growth patterns	Pigeon Guillemont on field of H. glandiforme
Another dense field of H. glandiforme	Large H. glandiforme growing with Fucus	H. glandiforme’s range overlapping with barnacles