- 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
Neoagardhiella Wynne & Taylor 1973
Thalli erect, branched, terete, with 1 to many axes arising from discoid bases. Erect axes to 4 mm diam., branching at irregular intervals. Medulla with core of longitudinal filaments surrounded by large cells, grading into cortex of small, pigmented cells. Tetrasporangia zonately divided, distributed in outer cortex. Spermatangia in small superficial patches, ultimately confluent and continuous throughout most upper branches. Carpogonial branches 3-celled, arising in inner cortex, growing inwardly, with trichogyne bent sharply outward at its base. Cystocarps prominently protuberant at maturity, with ostioles. Gonimoblast with central mass of sterile cells. Carposporangia terminal.
Neoagardhiella baileyi (Kütz.) Wynne & Tayl.
Rhabdonia baileyi Kützing 1866: 26. Neoagardhiella baileyi (Kütz.) Wynne & Taylor 1973: 101 (incl. synonymy). R. coulteri Harvey 1853: 154. Agardhiella coulteri (Harv.) Setchell, P.B.-A., 1895-1919 [1897]: no. 333; Kylin 1941: 18; Smith 1944: 260. A. tenera sensu Dawson 1961a: 231; Hollenberg & Abbott 1966: 83.
Thalli 10-40 cm tall, axes several from small holdfasts, occasionally stoloniferous; branches mostly irregular, sparse or dense, radial or distichous, 1-4 mm diam., of varying length, mostly elongate-acuminate, with acute apices and narrowed bases, mostly without further branches, but occasionally bearing 1 or 2 further orders; tetrasporangia averaging 42 µm diam., 70 µm long, occasionally germinating in situ; spermatangia as for genus; cystocarps 1-2 mm diam., numerous, bulging the thallus.
Common and extremely variable, on rocks, intertidal to subtidal (to 30 m) mostly near sand, Br. Columbia to Baja Calif. Also Peru. Type locality: Long I., New York.
Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.
