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DECEW'S GUIDE

Petrospongium rugosum ( Okamura ) Setchell et Gardner
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section of unilocular plant from Setchell and Gardner 1925 Synonyms: Cylindrocarpus rugosus Okamura Illustrations: Sporophyte: Abbott and Hollenberg 1976, p. 178, fig. 144 ( habit and reproductive anatomy ); Hollenberg 1942 a, p. 530, figs. 1 & ndash; 10 ( x-sections: unilocular and plurilocular organs, vegetative basal system, zooids, and germlings ); Setchell and Gardner 1925, pl. 39, fig. 42 ( x-section, unilocular organs ), fig. 43 ( habit ). Gametophytes: Arasaki 1948 c, p. 100, figs. 43 & ndash; 46 ( plurilocular gametangia ) Pacific Coast Distribution: Barkley Sound, Vancouver I ., British Columbia ( Garbary et al. 1985, p. 44 ); Coos Head, Ore. ( ORE 11691, OSC 4365 ); Humboldt Co ., Calif. ( Petrolia Beach, 4 miles south of Cape Mendocino: DeCew in UC; Shelter Cove: HSC 10071 ); Mendocino Co ., Calif. ( Fort Bragg; Chadbourne Gulch/Mussel Shoals; McKerricher Beach: Kjeldsen 1995, p. 17 ); Sonoma Co ., Calif ( Shell Beach; Bodega Head: Kjeldsen 1995, p. 17 ); Duxbury Reef, Marin Co ., Calif. ( UC 99392, UC 751362 ); San Francisco Bay, Calif. ( Silva in UC ); Moss Beach, San Mateo Co ., Calif. ( Smith 1944, p. 116 ); Monterey Peninsula, Calif. ( Smith 1944, p. 116 ); San Luis Obispo Co ., Calif. ( Sparling 1977, p. 31 ); Channel Is ., Calif. ( San Miguel I ., Santa Cruz I ., San Nicolas I ., Santa Barbara I ., Santa Catalina I.: Littler 1980 b, p. 299; San Clemente I.: Littler and Murray 1977 ); common throughout southern Calif. ( Dawson 1959 b, pp. 186, 188 ); Baja Calif. ( Isla San Benito, Isla Asuncion: Dawson 1953 b, p. 115 ) Taxonomic Notes: p. 000 Life History: alternation of heteromorphic phases, with the macroscopic plants bearing unilocular organs ( and dubious plurilocular structures on separate macroscopic plants from southern Calif. ), thus zoospores, and the microscopic filamentous stage bearing plurilocular gametangia. The gametes can facultatively recycle the gametophytic phase ( Arasaki 1948 c; Hollenberg 1942 a ) Biology/Ecology: Stewart 1989, p. 441; Littler and Arnold 1982, p. 309; Seapy and Littler 1982; Thom 1980 b, p. 105; Murray and Littler 1978, p. 509; Littler and Murray 1977, p. 22

							J	F	M	A	M	J	J	A	S	O	N	D
BRITISH COLUMBIA						Pl													Uncommon, on rocks of the upper and mid intertidal. Garbary et al. 1985, p. 44.
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COLUMBIA RIVER						Pl													Uncommon, on the side of a surge channel wall. ( ORE 11691, OSC 4365 ).
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CAPE ARAGO						Pl													Looked for but not found. ( DeCew ).
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						S
CAPE MENDOCINO						Pl													Uncommon, on rock on long flat slopes in the mid to upper intertidal on exposed coasts ( HSC 10071; Kjeldsen 1995, p. 17; DeCew in UC ).
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POINT ARENA						Pl													Common, on mid and upper intertidal rocks in exposed habitats. Johansen 1966 a, p. 98. Kjeldsen 1995, p. 17.
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						S
SAN FRANCISCO						Pl													Common, on upper mid intertidal rocks on exposed coast and mouth of San Francisco Bay. Smith 1944, p. 116. Silva 1979, p. 335.
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						S