- Blue markers: specimen records
- Yellow marker: type locality, if present
- Red markers: endpoints of range from literature
Illustration from DeCew's Guide to the Seaweeds of British Columbia, Washington, Oregon, and Northern California
Lomentaria Lyngbye 1819
Thalli erect, cylindrical or compressed, variously branched, hollow, without septa but closed at branch bases, with group of apical cells. Gland cells formed on internal longitudinal filaments. Sporangia scattered or somewhat grouped. Spermatangia formed in extensive surface areas. Carpogonial filaments 3-celled. Mostly gonimoblast cells forming carposporangia. Cystocarps protuberant, ostiolate.
Lomentaria hakodatensis Yendo
Yendo 1920: 6; Dawson 1963a: 466.
Thalli deep red, caespitose to bushy, 3-10 cm tall; branching chiefly radial, the branches cylindrical to compressed, somewhat terminally tapered to occasionally uncinate; tetrasporangia 100-140 µm diam., grouped in somewhat swollen, specialized, fusiform branchlets; spermatangia in reticulate sori in similar branchlets; cystocarps +/- 700 µm diam., prominently rostrate.
On rocks, subtidal (8-36 m), S. Calif. to Costa Rica; in Calif., known from tank-culture collection from 20 m, off Anacapa I., and saxicolous, low intertidal, La Jolla. Type locality: Japan.
Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.
NON-NATIVE
Type locality: Japan: Hokkaido (Hakodate; Otaru; Rishiri Is.); provs. Hidaka, Inaba, Boshu, Owari
