- 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 californica (Dec.) Silva
Amphiroa californica Decaisne 1842: 124. Bossiella californica (Dec.) Silva 1957b: 46.
Plants forming fanlike tufts, erect or dorsiventrally arranged, the branching dichotomous, pinnate, or irregular (often a combination of these patterns); branches often showing midrib if wings are thin, or without midrib if wings are thick; wings close-set; intergenicula in upper parts more than 2.5 mm long. Tetrasporangial conceptacles more common than bisporangial conceptacles, 4+ of either on each fertile intergeniculum.
Bossiella californica ssp. californica
Silva 1957b: 46; Johansen 1971b: 388 (incl. synonymy).
Fronds to 12 cm tall; branching irregular, pinnate or dichotomous; stipe to 2 mm broad; intergenicula 2-5 mm long, to 6 mm broad, sometimes obscurely sagittate, wings blunt and thick; tetrasporangial and bisporangial conceptacles (2)4-6(14) on surface of each fertile intergeniculum, in 2 rows parallel to and on each side of axis, the pore central; male and female plants also known.
Locally common, low intertidal, known from Bodega Head (Sonoma Co.), Monterey Peninsula, and Channel Is., Calif., to Bahia Asuncion, Baja Calif. Type locality: Monterey Peninsula, Calif.
Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.
