- Blue markers: specimen records
- Yellow marker: type locality, if present
- Red markers: endpoints of range from literature
Leptocladia J. Agardh 1892
Thalli uniaxial, with dome-shaped apical cell; cells of axis each producing 4 laterals transversely at right angles to each other, those in one plane more strongly developed than other. Rhizoidal filaments arising from basal cells of laterals. Ultimate branches of laterals forming cortex of 5-8 cell rows. Tetrasporangia irregularly cruciately divided, in small nemathecia. Spermatangia in small, superficial patches. Carpogonial branches of 12-18 cells. Auxiliary-cell branches of 8-18 cells, apparently without function. Development of gonimoblast similar to that in Weeksia, all cells becoming carposporangia.
Leptocladia binghamiae J. Ag.
J. Agardh 1892: 96; Dawson 1953a: 89; Abbott 1968: 194.
Thalli 15-30(60) cm tall, compressed, deep red, drying to blackish-red; main axes (1.5)4-5 mm wide, repeatedly branched dichotomously, sub dichotomously, and irregularly to 6-8 orders; margins of branches with short, pointed teeth; final orders of branching short and toothlike or slightly expanded; tetrasporangial plants more densely branched and taller than cystocarpic plants; tetrasporangia irregularly cruciately divided, surrounded by paraphyses in irregularly shaped nemathecia near apices of thallus; gonimoblasts developing as in Weeksia, with gonimoblast produced on carpogonial branch; cystocarps distorting cortex, with carpostome.
Frequent, saxicolous, subtidal (to 30 m), Cambria (San Luis Obispo Co.), Calif., through S. Calif., including Channel Is., to Baja Calif. and Galapagos Is. Type locality: Santa Barbara, 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.
