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Scytosiphon dotyii Wynne
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Misapplied Names: Scytosiphon attenuatus ( Foslie ) Doty Illustrations: Abbott and Hollenberg 1976, p. 199, fig. 161 ( habit ); Wynne 1969 a, p. 37, fig. 9 a ( x-section, vegetative thallus ), fig. 9 b ( x-section, thallus with plurilocular organs ), figs. 9 c & ndash; e ( germlings in culture ), pl. 18 ( photos: field-collected thalli ), pl. 19 ( photos: origin of uprights from germlings in culture ) Pacific Coast Distribution: Coos Head, Ore. ( Doty 1947, p. 38 ) to Monterey Peninsula, Calif. ( Wynne 1969 a, p. 35 ); San Luis Obispo Co ., Calif. ( Monta & ntilde; a de Oro State Park: Wynne 1969 a, p. 35; Shell Beach: Sparling 1977, p. 39 ); Point Conception, Santa Barbara Co ., Calif. ( Wynne 1969 a, p. 35 ) to Punta San Isidro, Baja Calif. ( R. Aguilar Rosas et al. 1984, p. 163 ); Channel Is ., Calif. ( San Miguel I.: Murray and Littler 1989, p. 67; Santa Rosa I.: Silva 3969 in UC [ Santa Rosa I. specimens cited by Wynne 1969 a, p. 35, were from Santa Cruz I. ]; Santa Cruz I.: Apt et al. 1988, p. 42; San Nicolas I.: Caplan and Boolootian 1967, p. 209; San Clemente I.: Wynne 1969 a, p. 35 ); Baja Calif.: Islas Los Coronados: Wynne 1969 a, p. 35 Taxonomy: Wynne 1969 a Phylogeny: G. Cho et al. 2001 Life History: apparent lack of sexual phase, with zoospores from plurilocular organs on tubular thalli germinating to produce prostrate filaments that coalesce to form discs, from which tubular thalli bearing plurilocular organs are produced ( Wynne 1969 a, p. 37; see also Loiseaux 1970 a for the life history of a dwarf Scytosiphon from central Calif. ) Biology/Ecology: Farrell 1988, p. 194; Sousa 1984, p. 1923; Murray and Littler 1978, p. 509; Littler and Murray 1977, p. 20; Caplan and Boolootian 1967, p. 209 ( as S. attenuatus )

							J	F	M	A	M	J	J	A	S	O	N	D
BRITISH COLUMBIA						Pl
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COLUMBIA RIVER						Pl													Abundant, in extensive stands on sloping rocks in the high and mid intertidal. Doty 1947, p. 38 ( as S. attenuatus ).
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CAPE ARAGO						Pl													Uncommon, on rock in high tide pools. Dawson 1965 a, p. 16.
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CAPE MENDOCINO						Pl													Common, on rock in high tide pools. Kjeldsen 1995, p. 30.
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POINT ARENA						Pl													Common, on rock in high tide pools. Kjeldsen 1995, p. 30.
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SAN FRANCISCO						Pl													Common, in dense stands on shaded faces of large boulders and cliffs in the upper intertidal. Wynne 1969 a, p. 35. Silva 1979, p. 336.
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