- 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
Illustration from DeCew's Guide to the Seaweeds of British Columbia, Washington, Oregon, and Northern California
Bossiella Silva 1957b
Thalli of crustose bases and articulated fronds. Fronds pinnately or dichotomously branched. Intergenicula flat, winged to varying degrees in Calif. species. Intergenicular medulla with arching tiers of straight cells
of same length. Genicula with a single tier of long, thick-walled cells. Conceptacles cortical in origin, usually originating in intergenicula somewhat below branch apices, the pores central or excentric; 2-8+ tetrasporangial or bisporangial conceptacles on surface of fertile intergeniculum, the sexual plants generally having more conceptacles per intergeniculum; more than 10 sporangia produced in tetrasporangial or bisporangial conceptacle at any one time. Spermatangial conceptacles beaked, the conceptacular canal 100+ µm long. Procarpic conceptacles containing 100+ supporting cells. Fusion cell thin and broad, with carposporangial filaments arising anywhere on surface.
Bossiella plumosa (Manza) Silva
Bossea plumosa Manza 1937a: 46; 1940: 303. Bossiella plumosa (Manza) Silva 1957b: 47; Ganesan 1968b: 16. Bossea frondifera Manza 1937b: 56:2.
Plants to 7 cm tall; branching pinnate from every or almost every upper axial intergeniculum, some pinnae consisting of a single intergeniculum; intergenicula generally 1 mm long or less, to 3 mm broad, prominently winged, the wings thin, sharp-edged, the upper part of wings lacking where branches arise; usually 2 conceptacles on face of fertile intergeniculum, the pore central; tetrasporangial plants common, bisporangial plants rare; male and female plants also known.
Common, saxicolous, lower intertidal, Alaska to Baja Calif. Type locality: Moss Beach (San Mateo Co.), Calif.
Easily confused with Corallina frondescens, but lacking the axial and pseudolateral conceptacles present in that species.
Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.
