Abbott and Hollenberg 1976, p. 102, fig. 59 (basal portion with holdfast); Scagel 1966, pl. 34, fig. a (juvenile plant), fig. b (basal portion with holdfast), fig. c (cellular detail)
Pacific Coast Distribution:
Strait of Georgia, British Columbia (Scagel et al. 1989, p. 61) ; Washington (Juan de Fuca Strait; Hein Bank: Scagel 1966, p. 83; Seattle: Thom et al. 1977, p. 269); Shell Beach, Sonoma Co., Calif. (Kjeldsen 1995, p. 3); Tomales Bay, Marin Co., Calif. (Kjeldsen 1995, p. 3); San Francisco Bay, Calif. (Silva 1979, p. 342); Laguna Beach, Orange Co., Calif. (Abbott and Hollenberg 1976, p. 101); La Jolla, San Diego Co., Calif. (Dawson 1945c, p. 20)
Life History:
uninvestigated, but presumably alternation of isomorphic phases, with quadriflagellate zoospores, and biflagellate gametes as for genus
Biology/Ecology:
Stewart 1982, p. 53
J
F
M
A
M
J
J
A
S
O
N
D
BRITISH COLUMBIA
Repr
Uncommon, on high and low intertidal rocks, shells, and on Acmaea instabilis in pools, and in the subtidal to 5 fathoms. Scagel 1966, p. 83. Thom et al. 1977, p. 269.
Ster
COLUMBIA RIVER
Repr
Ster
CAPE ARAGO
Repr
Ster
CAPE MENDOCINO
Repr
Ster
POINT ARENA
Repr
Uncommon, on rocks and shells (Acmaea) in shallow, sandy pools in the high and low intertidal and the subtidal. Kjeldsen 1995, p. 3. Silva 1979, p. 342.