- Blue markers: specimen records
- Yellow marker: type locality, if present
- Red markers: endpoints of range from literature
Cumagloia Setchell & Gardner 1917
Thalli gregarious, with 1 or more fronds pendant from small, discoid holdfasts. Fronds cylindrical to strongly flattened, unbranched or sparingly branched, densely covered with fine, spinelike branchlets with furcate apices. Internally multiaxial, the longitudinally directed filaments slender and bearing cortical filaments dichotomously or trichotomously branched; outermost cells frequently larger than subterminal cells. Chloroplast single, laminate, parietal, without pyrenoid. Tetrasporangia unknown. Plants monoecious or dioecious. Spermatangia in irregular terminal clusters on cortical cells. Carpogonial branch 3-celled, borne laterally, low on cortical filaments. Zygote after fertilization dividing transversely, or not dividing, then forming horizontal filaments, which in turn bear short vertical filaments, these cutting off single carposporangia in sympodial fashion. Carpospores on germination producing acrochaetioid growth, their fate unknown. Poorly developed group of sterile filaments produced immediately adjacent to basal portion of carpogonial branch and not developing further.
Cumagloia andersonii (Farl.) S. & G.
Nemalion andersonii Farlow 1877: 240. Cumagloia andersonii (Farl.) Setchell & Gardner 1917d: 399; Smith 1944: 188.
Thalli (in Calif. material) annual, 15-30(90) cm tall, olive brown to deep purplish-red, gelatinous but tough; young axes cylindrical, 1-8 mm diam., older axes flattened, 1-3 cm wide, reaching maximum development in August in C. Calif.
Locally abundant in season, saxicolous, upper intertidal, Hope I., Br. Columbia, to Cabo Colnett, Baja Calif.; commonly found year after year on same rocks. Type locality: Santa Cruz, 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.
