CENTER FOR PHYCOLOGICAL DOCUMENTATION
DECEW'S GUIDE

Hedophyllum sessile ( C. Agardh ) Setchell
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Synonyms: Hafgygia bongardiana f. subsessilis Areschoug, Laminaria bongardiana f. sessilis ( Areschoug ) Kjellman, Hedophyllum subsessile ( Areschoug ) Setchell Illustrations: Sporophyte: Abbott and Hollenberg 1976, p. 233, fig. 192 ( habit ); Scagel 1967, p. 137, fig. 54 ( habit ); Setchell and Gardner 1925, pl. 73 ( photo: habit ); Saunders 1901, pl XVIII ( habit ). Gametophytes: Blinn and Markham 1969, p. 53, figs. 6, 8 ( photos: immature plants, possibly with oogonia ) Pacific Coast Distribution: Attu I ., Aleutian Is ., Alaska ( Setchell and Gardner 1925, p. 618 ) to Santa Cruz, Calif. ( UC 1408296 ); disjunct to Point Sur, Monterey Co ., Calif. ( UC 96820 ); San Simeon, San Luis Obispo Co ., Calif. ( drift, UC 981484; Sparling 1977, p. 37 ) Taxonomy: Widdowson 1965 a Evolution: Estes and Steinberg 1988 Life History: alternation of heteromorphic phases, with a macroscopic sporophyte and microscopic gametophytes ( Blinn and Markham 1969 ). Biology/Ecology: Sloan and Bartier 2000, p. 14; L & uuml; ning 1990; Armstrong 1989; Foster et al. 1988, p. 7; L & uuml; ning and Freshwater 1988, p. 312; Padilla 1988; Rostal and Simpson 1988; Armstrong 1987; Leigh et al. 1987, p. 1315; D ' Antonio 1986 b, p. 267; Duggins and Dethier 1985; Padilla 1985; Turner 1985, p. 86; Turner 1983 a, p. 63; Turner 1983 b, p. 733; Dethier 1982, p. 63; Druehl and Green 1982, p. 167; Sousa et al. 1981, p. 297; Paine 1980, p. 676; Dayton 1975; Himmelman and Carefoot 1975; Hruby 1975, p. 883; Paine 1974, p. 103; Druehl 1970, p. 239; Druehl 1969, p. 163; Paine and Vadas 1969 a, p. 713; Paine and Vadas 1969 b, p. 80; R. Lee 1965 a, p. 14; R. Lee 1965 b, p. 111; Widdowson 1965 b, p. 1428; Scagel 1961, p. 528; Stephenson and Stephenson 1961 b, p. 234; Rigg and Miller 1949; Doty 1946, p. 323 Epiphytes: Gononema aecidioides , Porphyra gardneri Ultrastructure: Henry and Cole 1982 b, p. 571; Henry and Cole 1982 a, p. 551 Physiology: Wing and Patterson 1993; K. Schmitz 1982, p. 171; Kremer 1979, p. 246; Willenbrink et al. 1979, p. 891 Chemistry: Khotimchenko et al. 2002; Van Alstyne et al. 1999; Whyte and Englar 1983, p. 163 Economic Applications: Druehl and Boal 1981, p. 578; Mumford 1980, p. 19

							J	F	M	A	M	J	J	A	S	O	N	D
BRITISH COLUMBIA						Pl													Common, on rocks in pools and in the mid and low intertidal and upper subtidal in moderately sheltered to fully exposed habitats. Scagel 1957, p. 102. Scagel 1973, p. 133. Hawkes et al. 1979, p. 93.
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COLUMBIA RIVER						Pl													Common throughout the range, a conspicuous form indicator of MLLW to LHLW. Doty 1947, p. 42. Sanborn and Doty 1947, p. 30. Markham and Celestino 1977, p. 258.
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CAPE ARAGO						Pl													Common, on exposed rocky shores, in the mid and low intertidal. Dawson 1965 a, p. 18.
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CAPE MENDOCINO						Pl													Common, in the mid and low intertidal on exposed rocky shores. Dawson 1965 a, p. 18. Kjeldsen 1995, pp. 22, 23.
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POINT ARENA						Pl													Abundant, on rocks of the mid and low intertidal in exposed habitats. Johansen 1966 a, p. 102. Kjeldsen 1995, pp. 22, 23.
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SAN FRANCISCO						Pl													Disjunct from Santa Cruz to Point Sur ( DeCew ).
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