Phylum: Rhodophyta

Class: Florideophyceae

Order: Cryptonemiales

Family: Corallinaceae

Corallina vancouveriensis (Yendo)

Description: This plant is erect, 4-10 cm. high, deep purple in colour, arising from an encrusting basal layer attached securely to the substrate. The erect portion is a branched system of jointed segments. The segments below are cylindrical, about 0.75 mm. diameter; above slightly compressed and about 1 mm. broad. The axes are clothed with narrower short lateral branchlets, all approximately the same length. Branching in the lower region is distichously pinnate with branches usually simple; above distichously pinnate or verticillate with branchlets usually pinnately subdivided.

Habitat: On rocks in the lower intertidal and upper subtidal zones and in tide-pools.

Pacific Coast Distribution: Alaska to Mexico.

Robert Scagel, 1972

C. vancouveriensis in a tide pool, some bleached white by the sun	More C. vancouveriensis in a tide pool

Phylum: Rhodophyta

Class: Florideophyceae

Order: Cryptonemiales

Family: Corallinaceae

Corallina officinalis (L.)

Description: This plant is erect, 4-6 cm. high, dark pink in colour, arising from an encrusting basal layer attached securely to the substrate. The erect portion is a branched system of jointed segments. The segments below are cylindrical, about 0.75 mm. diameter; above slightly compressed and about 1 mm. broad. The axes are clothed with narrower short lateral branchlets that shorten to the apex. Branching pattern gives the plant a clumpy appearance.

Habitat: On rocks in the lower intertidal and upper subtidal zones and in tide-pools.

Pacific Coast Distribution: Alaska to Mexico.

C. gracilis growing on a tide pool wall	Anne K. Salomon investigating a bleached patch of C. gracilis
C. gracilis with other Rhodophytes	C. gracilis with other Rhodophytes