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from Scagel 1966
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Synonyms:
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Ulothrix laetevirens (Harvey) Collins, U. pseudoflacca Wille, U. pseudoflacca f. maxima Setchell et Gardner
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Illustrations:
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Abbott and Hollenberg 1976, p. 55, figs. 4, 6 (cellular detail), fig. 5 (habit and cellular detail); Burrows 1991, p. 49, fig. 13 (cellular detail): A (vegetative plant), B–D (reproductive plant with sporangia), E (gametangium); Lokhorst 1979, p. 270, fig. 6 (vegetative filaments, showing coalescence and cellular detail), p. 271, fig. 7: a (filaments with aplanosporangia and zoosporangia), b (zoospores), c, d (germination of zoospores); p. 273, fig. 9: a (filaments with gametangia), b (isogametes and zygotes), c (germination of zygotes), d (fertile sporophyte), p. 274, fig. 10: a (fertile sporophytes), b (zoospores from sporophyte), c (sporophytes with aplanospores), d (germination of aplanospores in sporophyte), e (parthenogenetic development of gametes in filament); Scagel 1966, pl. 16, figs. C, K (juvenile gametophytes), fig. D (cellular detail), fig. E (zoosporangia), fig. F (zoosporangial discharge pores), fig. G (aplanospore), fig. H (zoospores), figs. L, M (branched filaments with cellular detail); Scagel 1967, p. 39, fig. 7:a (habit), b (basal portion of filament), c, d (cellular detail), e (zoosporangia), f (zoospore)
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Pacific Coast Distribution:
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Alaska (Amchitka I., Aleutian Is.: Lebednik and Palmisano 1977, p. 360; Unalaska I., Aleutian Is.: Setchell and Gardner 1920b, p. 286; Prince William Sound: Johansen 1971b, p. 66; Glacier Bay: Saunders 1901, p. 412; Sitka: Setchell and Gardner 1920b, pp. 285, 286); Barkley Sound, Vancouver I., British Columbia (Garbary et al. 1985, p. 44); Washington (Fairhaven, Bellingham Bay: Setchell and Gardner 1903, p. 217; Seattle: Thom et al. 1977, p. 270); Oregon (Ecola State Park, Clatsop Co.: Markham and Celestino 1977, p. 257; Cape Arago, Coos Co.: Doty 1947, p. 5; South Slough, Coos Bay: Sanborn and Doty 1947, p. 19); Humboldt Co., Calif. (Fields Landing, Humboldt Bay and Trinidad: Dawson 1965a, p. 6); San Francisco, Calif. (Lands End:Gardner 1919, p. 488; Marina: Silva 1979, p. 339); Berkeley, Alameda Co., Calif. (Silva 1979, p. 339); Pacific Grove, Monterey Peninsula, Calif. (Hollenberg and Abbott 1966, p. 9[619]); Shell Beach, San Luis Obispo Co., Calif. (Sparling 1977, p. 28); Channel Is., Calif. (Santa Catalina I.: Murray 1974, p. 39)
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Taxonomy:
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Burrows 1991, p. 48; Lokhorst 1979, p. 207 (see: Taxonomic and Nomenclatural Notes, p. 000
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Life History:
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uninvestigated in Pacific coast populations; in the Netherlands, alternation of bisexual gametophytic filaments with a unicellular sporophyte by means of quadriflagellate zoospores and biflagellate isogametes; filaments recycling by means of aplanospores and zoospores similar to those produced by sporophyte; parthenogenesis occasionally observed (Lokhorst 1979); in France, zygotes germinating immediately to produce sporophytic filaments similar to gametophytic filaments or encysted zygotes forming aplanospores which give rise to unisexual gametophytic filaments that produce anisogametes (Perrot 1968)
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Biology/Ecology:
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Thom 1984a, p. 54; Sibert 1982, p. 209; Lubchenco and Cubit 1980, p. 677; Lokhorst 1979, p. 219; Pomeroy 1977, p. 101; Pomeroy and Stockner 1976, p. 1179; R. Lee 1965b, p. 111
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Chemistry:
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Dickson et al. 1979, p. 4
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Ultrastructure:
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Lokhorst 1979, p. 217
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