Conferva flexuosa Roth, 1800b: 188–190, nom. illeg. (type locality: Diuno, near Trieste, Italy).
Ulva flexuosa Wulfen, 1803: 1.
Enteromorpha flexuosa (Wulfen) J. Agardh, 1883: 126–128.—De Toni, 1889: 121–122.— De Toni & Forti, 1923: 85–86.— Børgesen, 1934b: 6.— Børgesen, 1935: 8.— Børgesen, 1940: 9.— S. Dixit, 1940a: 84.— S. Dixit, 1941: 127.— Børgesen, 1946: 8.— Gerloff, 1957: 758.— S. Dixit, 1966: 3.— W.R. Taylor, 1966a: 343.— Mairh, 1968: 81.— V. Krishnamurthy & H. Joshi, 1970: 3.— Rhyne, 1971: 52.— H. Joshi & V. Krishnamurthy, 1972: 122–123, figs. 1E, 2D,T.— Subbaramaiah, 1972: 395.— Subbaramaiah, 1974: 59.— M. Dave & Parekh, 1975: 43.— Sivalingam et al., 1976: 10.— Basson et al., 1977: 264.— R. Parekh, Maru, & Dave, 1977: 360.— Sivalingam, 1977b: 206.— Chauhan, 1978: table 4.— M. Joseph, 1978a: 17.— Sivalingam, 1978a: 329.— Basson, 1979: 48, pl. I: fig. 2.— Farghaly, 1980: 50.— Lawson, 1980: 12.— Sivalingam, 1980b: table 1.— Allender, 1981: 22.— Crane, 1981: 147, fig. 1.— Dhargalkar, Agadi, & Untawale, 1981: 76.— Ohno et al., 1981: 51, fig. 1.— Nair, Sobha, & Arunachalam, 1982: 266 (table 1).— Mairh et al., 1983: 1–22, figs. 1–19, tables 1–6.— Untawale, Dhargalkar, & Agadi, 1983: [8], fig. 1.— Agadi, 1985: 37.— Mairh et al., 1985: 381–384, fig. 1.— Oza, Tewari, et al., 1985: 153–164, figs. 1–12.— R. Parekh et al., 1985: 5–11.— Sobha & Nair, 1985: 20.— P. Subba Rao et al., 1985: 31.— Banaimoon, 1986: 126.— D. Jones, 1986: 26, pl. 2.— Mairh, Pandey, & Tewari, 1986: 212–218, figs. 1, 2, tables 1–5.— Nair et al., 1986: 735.— Ramavat et al., 1986: 46, tables 1–3.— Chennubhotla, Kaliaperumal, & Kalimuthu, 1987a: 100–101.— Tewari, 1987: 183.— Banaimoon, 1988b: 236.— Dave, Ramavat, & Chauhan, 1988: 73, table 1.— Al-Hasan & W. Jones, 1989: 292, pl. 1: fig. 3.— Basson, Mohamed, & Arora, 1989: 28.— Mairh, Ramavat, et al., 1989: 3307, table 1.— Untawale, Reddy, & Deshmukhe, 1989: table 1.— J. Wright, 1989: 187.— Nair et al., 1990: table 2.— Steinke & Naidoo, 1990: 229 (table 1).— Phang & Wee, 1991: 56.— Siddhanta et al., 1991: 365.— Banaimoon, 1992: 165, table I.— Basson, 1992: 219.— Coppejans, Beeckman, & De Wit, 1992: 64.— Kalugina-Gutnik, Perestenko, & Titlyanova, 1992: 25 (table 1).— Titlyanova, Perestenko, & Kalugina-Gutnik, 1992: 45.— Ormond & Banaimoon, 1994: 116.
Taxonomic synonyms:
Enteromorpha intestinalis (Linnaeus) Nees var. tubulosa Kützing, 1845: 247 (type locality: fresh water, Germany).—G. Martens, 1869a: 234.— S. Dixit, 1968: 12.— Saifullah & Nizamuddin, 1977: 530–531, figs. 26–28, pl. III:D.— Usmanghani et al., 1984: 75.— Shameel & Afaq Hussain, 1987: 293.— Shameel, Afaq-Husain, & Shahid-Husain, 1989: 178.
Enteromorpha tubulosa (Kützing) Kützing, 1856: 11.—Børgesen, 1935: 8–9.— P. Anand, 1940: 15, fig. 2D.— Newton, 1953: 396.— Salim, 1965: 197.— S. Dixit, 1966: 3.— J. Parekh, Bhalala, et al., 1969: table I.— H. Joshi & V. Krishnamurthy, 1972: 121, figs. 1J, 2G,W.— Karekar & G. Joshi, 1973a: 384.— Karekar & G. Joshi, 1973b: 216, 217, 218, figs. 3, 4.— G. Joshi & Karekar, 1974: 489, 490, tables I, II.— G. Joshi et al., 1974: 51, 52.— Parulekar, 1974: 617.— M. Dave & Parekh, 1975: 43.— G. Joshi, 1977: figs. 1, 2, tables I, II.— R. Parekh, Maru, & Dave, 1977: 360.— Chauhan, 1978: table 4.— Chauhan & Mairh, 1978: 33.— Shitole & G. Joshi, 1979: 21.— Teo & Wee, 1983: 33, fig. 20.— Untawale, Dhargalkar, & Agadi, 1983: [8].— Balasundaram, 1985: 180 ff.— R. Qasim & Barkati, 1985: table 2.— Jagtap, 1987: table 1.— Dave, Ramavat, & Chauhan, 1988: 73, table 1.— Mairh, Ramavat, et al., 1989: 3307.— Untawale, Reddy, & Deshmukhe, 1989: table 1.— V. Krishnamurthy & Balasundaram, 1990: 11 ff., figs. 4, 5, table I.— Phang & Wee, 1991: 56.— S. Balakrishnan, Ravichandran, & Kaliaperumal, 1992: 65.— V. Kumar, 1993a: 139, 140 (`tuberosa').— V. Kumar, 1993b: 47 (`tuberosa').
Enteromorpha prolifera (O.F. Müller) J. Agardh var. tubulosa (Kützing) Batters, 1902: 12.—Zaneveld, 1950: 113.— V. Krishnamurthy, 1954: 173.— Zaneveld, 1956: 12.— Zaneveld, 1959: 98.— V. Krishnamurthy & H. Joshi, 1970: 3.— Tewari, 1972: 167, table I.
Enteromorpha intestinalis (Linnaeus) Nees forma tubulosa (Kützing) V. Chapman, 1937: 229.—P. Anand, 1940: 6, 13, fig. 1D.— Salim, 1965: 194.
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Note: The synonymy was proposed by Bliding (1963: 73–79). Conferva flexuosa Roth, the intended basionym of Enteromorpha flexuosa, is not priorable since it is a later homonym of C. flexuosa O.F. Müller (1782) (Cladophora flexuosa (O.F. Müller) Kützing (q.v.)). Ulva flexuosa Wulfen is treated as a nomen novum in accordance with Art. 58.3.