1. Species Ulva acanthophora (Kützing) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
2. Species Ulva adhaerens Kaoru Matsumoto & S.Shimada, 2015
3. Species Ulva ambigua De Candolle, 1815
4. Species Ulva anandii Amjad & Shameel, 1993
5. Species Ulva aragoensis (Bliding) Maggs in Krupnik et al., 2018
6. Species Ulva arasakii Chihara, 1969
7. Species Ulva arbuscula Lagourgue & Payri, 2022
8. Species Ulva ardreana M.Cormaci, G.Furnari & G.Alongi, 2013
9. Species Ulva atroviridis Levring, 1938
10. Species Ulva aurantiaca Poiret, 1808
11. Species Ulva australis Areschoug, 1854
12. Species Ulva batuffolosa Lagourgue & Payri, 2022
13. Species Ulva beytensis Thivy & Sharma, 1966
14. Species Ulva biflagellata Bliding, 1944
15. Species Ulva binalis Hassall
16. Species Ulva blidingii Alongi, Cormaci & G.Furnari, 2014
17. Species Ulva brevistipita V.J.Chapman, 1956
18. Species Ulva brisbanensis L.G.Kraft, Kraft & R.F.Waller, 2010
19. Species Ulva bulbosa Pasilot de Beauvois, 1805
20. Species Ulva burmanica (Zeller) De Toni, 1889
21. Species Ulva byssoides Mertens
22. Species Ulva calendulifolia (S.G.Gmelin) J.F.Gmelin
23. Species Ulva californica Wille, 1899
24. Species Ulva caulescens J.V.Lamouroux
25. Species Ulva ceranoides W.Withering
26. Species Ulva chaetomorphoides (Børgesen) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
27. Species Ulva chaugulii M.G.Kavale & M.A.Kazi, 2016
28. Species Ulva cinerea Martens ex De Notaris
29. Species Ulva clathrata (Roth) C.Agardh, 1811
30. Species Ulva clathrus (Gmelin) Poiret
31. Species Ulva coccinea Hudson, 1778
32. Species Ulva compressa Linnaeus, 1753
33. Species Ulva confervoides Thuillier, 1813
34. Species Ulva conglobata Kjellman, 1897
35. Species Ulva cornea Poiret
36. Species Ulva cornuta Lightfoot, 1777
37. Species Ulva costata Wollny, 1881
38. Species Ulva covelongensis V.Krishnamurthy & H.Joshi, 1969
39. Species Ulva crassa V.J.Chapman, 1956
40. Species Ulva crassimembrana (V.J.Chapman) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
41. Species Ulva cribrosa (J.Agardh) Bornet
42. Species Ulva crispa P.J.L.Dangeard, 1959
43. Species Ulva croatica Alongi, Cormaci & Furnari, 2014
44. Species Ulva cuneata Forsskål, 1775
45. Species Ulva curvata (Kützing) De Toni, 1889
46. Species Ulva damaeformis Roth
47. Species Ulva dangeardii Gayral & Mazancourt , 1962
48. Species Ulva denticulata P.J.L.Dangeard, 1959
49. Species Ulva diaphana Hudson, 1778
50. Species Ulva diluviana Schlotheim
51. Species Ulva divisa Suhr
52. Species Ulva elegans Gayral, 1962
53. Species Ulva enteromorpha Le Jolis, 1863
54. Species Ulva erecta (Lyngbye) Fries
55. Species Ulva expansa (Setchell) Setchell & N.L.Gardner, 1920
56. Species Ulva fasciculata A.P.de Candolle
57. Species Ulva fenestrata Postels & Ruprecht, 1840
58. Species Ulva fetida (D.Villars) J.P.E.Vaucher
59. Species Ulva finissima Lagourgue & Payri, 2022
60. Species Ulva flabelliformis Roth
61. Species Ulva flabelliformis Wulfen
62. Species Ulva flavescens Hudson, 1778
63. Species Ulva flexuosa Wulfen, 1803
64. Species Ulva foliacea Poiret
65. Species Ulva fungosa (Desfontaines) Poiret
66. Species Ulva gayralii Cauro
67. Species Ulva gelatinosa Kützing, 1856
68. Species Ulva geminoidea V.J.Chapman, 1956
69. Species Ulva gigantea (Kützing) Bliding, 1969
70. Species Ulva grandis Saifullah & Nizamuddin, 1977
71. Species Ulva hookeriana (Kützing) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
72. Species Ulva hopkirkii (M'Calla ex Harvey) P.Crouan & H.Crouan
73. Species Ulva howensis (A.H.S.Lucas) Kraft, 2007
74. Species Ulva iliohaha H.L.Spalding & A.R.Sherwood, 2016
75. Species Ulva incurvata Parriaud, 1959
76. Species Ulva indica Roth, 1806
77. Species Ulva infundibuliformis Turra, 1780
78. Species Ulva intestinalis Linnaeus, 1753
79. Species Ulva intestinaloides (Koeman & Hoek) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
80. Species Ulva intricata Thuillier, 1836
81. Species Ulva involvens Savi
82. Species Ulva javanica N.L.Burman, 1768
83. Species Ulva kanagawae V.Carneiro, N.T.Martins & Cassano, 2023
84. Species Ulva kylinii (Bliding) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
85. Species Ulva lactuca Linnaeus, 1753
86. Species Ulva lactucifolia S.F.Gray
87. Species Ulva laingii V.J.Chapman, 1956
88. Species Ulva lapathifolia (Kützing) De Toni
89. Species Ulva leptophylla Arasaki
90. Species Ulva linearis P.J.L.Dangeard, 1957
91. Species Ulva linza Linnaeus, 1753
92. Species Ulva linzoides Alongi, Cormaci & G.Furnari, 2014
93. Species Ulva lippii Lamouroux
94. Species Ulva litoralis Suhr ex Kützing
95. Species Ulva littorea Suhr
96. Species Ulva maculata Poiret
97. Species Ulva maeotica (Proshkina-Lavrenko) P.M.Tsarenko, 2011
98. Species Ulva marginata (J.Agardh) Le Jolis
99. Species Ulva micrococca (Kützing) Gobi
100. Species Ulva minima Vaucher
101. Species Ulva multifida J.E.Smith, 1808
102. Species Ulva myriotrema (Kg.)P.L.Crouan & H.M.Crouan, 1852
103. Species Ulva nitens C.Agardh
104. Species Ulva nitida Bertoloni, 1810
105. Species Ulva ohiohilulu H.L.Spalding & A.R.Sherwood, 2016
106. Species Ulva ohnoi Hiraoka & S.Shimada, 2004
107. Species Ulva opuntia (Goodenough & Woodward) Poiret
108. Species Ulva orbiculata (Thuret) Rabenhorst
109. Species Ulva oryziformis Forsskål, 1775
110. Species Ulva pacifica Endlicher, 1843
111. Species Ulva papenfussii P.H.Hô, 1969
112. Species Ulva paradoxa C.Agardh, 1817
113. Species Ulva parva V.J.Chapman, 1956
114. Species Ulva parvula Kützing, 1849
115. Species Ulva paschima F.Bast, 2014
116. Species Ulva patengensis Salam & Khan, 1981
117. Species Ulva pennata Lagourgue & Payri, 2022
118. Species Ulva phyllosa (V.J.Chapman) Papenfuss, 1960
119. Species Ulva pisiformis Hudson, 1778
120. Species Ulva pisum (O.F.Müller) Loureiro, 1790
121. Species Ulva planiramosa Lagourgue & Payri, 2022
122. Species Ulva plicata O.F.Müller, 1780
123. Species Ulva pluriramosa Lagourgue & Payri, 2022
124. Species Ulva polyclada Kraft, 2007
125. Species Ulva popenguinensis P.J.L.Dangeard, 1959
126. Species Ulva porrifolia (S.G.Gmelin) J.F.Gmelin
127. Species Ulva profunda W.R.Taylor, 1928
128. Species Ulva prolifera O.F.Müller, 1778
129. Species Ulva proliferoides L.G.Kraft, Kraft & R.F.Waller, 2010
130. Species Ulva pseudocurvata Koeman & Hoek, 1981
131. Species Ulva pseudolinza (Koeman & Hoek) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
132. Species Ulva pseudorotundata M.Cormaci, G.Furnari & G.Alongi, 2014
133. Species Ulva pulchra Jaasund, 1976
134. Species Ulva quilonensis Sindhu & Panikkar, 1995
135. Species Ulva radiata (J.Agardh) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003
136. Species Ulva ralfsii (Harvey) Le Jolis, 1863
137. Species Ulva ranunculata Kraft & A.J.K.Millar, 2000
138. Species Ulva recisa Poiret
139. Species Ulva refracta 'J.E.Smith'
140. Species Ulva repens Clemente, 1807
141. Species Ulva reticulata Forsskål, 1775
142. Species Ulva rhacodes (Holmes) Papenfuss, 1960
143. Species Ulva rigida C.Agardh, 1823
144. Species Ulva rivularis F.X.Wulfen
145. Species Ulva rivularis Corda
146. Species Ulva rotundata Bliding, 1968
147. Species Ulva rupestris J.E.Smith
148. Species Ulva sagarum (S.G.Gmelin) J.F.Gmelin
149. Species Ulva saifullahii Amjad & Shameel, 1993
150. Species Ulva schousboei Bornet, 1892
151. Species Ulva scolopendra Lagougue & Payri, 2022
152. Species Ulva serrata A.P.de Candolle
153. Species Ulva siganiphyllia Lagourgue & Payri, 2022
154. Species Ulva sorensenii V.J.Chapman, 1956
155. Species Ulva spinulosa Okamura & Segawa, 1936
156. Species Ulva splitiana Alongi, Cormaci & Furnari, 2014
157. Species Ulva sporadica Miliarakis
158. Species Ulva spumosa Lagourgue & Payri, 2022
159. Species Ulva squamaria (Gmelin) Woodward
160. Species Ulva squamaria (Gmelin) Roth
161. Species Ulva squarrosa (G.C.Oeder) J.E.Gunnerus
162. Species Ulva stenophylla Setchell & N.L.Gardner, 1920
163. Species Ulva stenophylloides L.G.Kraft, Kraft & R.F.Waller, 2010
164. Species Ulva sublitoralis Segawa
165. Species Ulva sublittoralis Segawa, 1938
166. Species Ulva subulata (Wulfen) Naccari
167. Species Ulva taeniata (Setchell) Setchell & N.L.Gardner, 1920
168. Species Ulva tanneri H.S.Hayden & Waaland, 2003
169. Species Ulva tentaculosa Lagourgue & Payri, 2022
170. Species Ulva tepida Masakiyo & S.Shimada, 2014
171. Species Ulva tesellata J.D.Hooker & Harvey
172. Species Ulva tetragona A.P.de Candolle, 1807
173. Species Ulva torta (Mertens) Trevisan, 1842
174. Species Ulva tremelloides (Bertoloni) Pollini
175. Species Ulva trichophylla Kützing
176. Species Ulva tuberosa Palisot de Beauvois
177. Species Ulva turbinata Pollini
178. Species Ulva ulvella H.Davies
179. Species Ulva uncialis (Kützing) Montagne, 1850
180. Species Ulva uncinata Mohr
181. Species Ulva uncinata Mertens
182. Species Ulva undulata Raddi
183. Species Ulva undulata Turra, 1780
184. Species Ulva usneoides Bonnemaison
185. Species Ulva utricularis (Roth) C.Agardh
186. Species Ulva utriculata Poiret, 1817
187. Species Ulva utriculosa C.Agardh
188. Species Ulva uvoides Bory de Saint-Vincent
189. Species Ulva vermicularis Roth, 1788
190. Species Ulva vietnamensis L.-A.T.Tran, Leliaert & De Clerck, 2022
191. Species Ulva vinosa Gouan
192. Species Ulva viridis Forssk.
193. Species Ulva woodwartii Poiret
194. Species Ulva adspersa Mertens ex Roth, 1806 accepted as Cutleria adspersa (Mertens ex Roth) De Notaris, 1842 (synonym)
195. Species Ulva amamiensis Tanaka, 1956 accepted as Umbraulva amamiensis (Tanaka) Bae & I.K.Lee, 2001 (synonym)
196. Species Ulva angusta Setchell & N.L.Gardner, 1920 accepted as Ulva californica Wille, 1899
197. Species Ulva armoricana P.Dion, B.de Reviers & G.Coat, 1998 accepted as Ulva rigida C.Agardh, 1823
198. Species Ulva articulata Hudson, 1762 accepted as Lomentaria articulata (Hudson) Lyngbye, 1819 (synonym)
199. Species Ulva atomaria Woodward, 1797 accepted as Taonia atomaria (Woodward) J.Agardh, 1848 (synonym)
200. Species Ulva atropurpurea Olivi, 1791 accepted as Porphyra atropurpurea (Olivi) De Toni, 1897 (synonym)
201. Species Ulva aureola C.Agardh, 1829 accepted as Capsosiphon fulvescens (C.Agardh) Setchell & N.L.Gardner, 1920 (synonym)
202. Species Ulva baltica Areschoug accepted as Monostroma balticum Wittrock, 1866 (synonym)
203. Species Ulva bartayresiana (Lamouroux) Martius, 1833 accepted as Dictyota bartayresiana J.V.Lamouroux, 1809 (synonym)
204. Species Ulva bertolonii C.Agardh, 1823 accepted as Ulva linza Linnaeus, 1753
205. Species Ulva bifrons Ardré, 1967 accepted as Ulva ardreana M.Cormaci, G.Furnari & G.Alongi, 2013
206. Species Ulva blyttii Areschoug, 1850 accepted as Ulvaria obscura var. blyttii (Areschoug) Bliding, 1969 (synonym)
207. Species Ulva bulbosa A.P.de Candolle, 1805 accepted as Saccorhiza polyschides (Lightfoot) Batters, 1902 (synonym)
208. Species Ulva bulbosa (Suhr) Hariot, 1889 accepted as Ulva hookeriana (Kützing) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003 (synonym)
209. Species Ulva bullata Poiret, 1808 accepted as Rivularia bullata Berkeley ex Bornet & Flahault, 1886 (synonym)
210. Species Ulva bullata A.P.de Cancolle, 1807 accepted as Nostoc bullatum (A.P.de Candolle) Duby, 1830
211. Species Ulva bullosa Roth, 1806 accepted as Monostroma bullosum (Roth) Thuret, 1854 (synonym)
212. Species Ulva caespitosa Withering, 1776 accepted as Catenella caespitosa (Withering) L.M.Irvine, 1976 (synonym)
213. Species Ulva capensis J.E. Areschoug, 1851 accepted as Ulva uncialis (Kützing) Montagne, 1850 (synonym)
214. Species Ulva capillaris Hudson, 1778 accepted as Chondria capillaris (Hudson) M.J.Wynne, 1991 (synonym)
215. Species Ulva caprina Gunnerus, 1772 accepted as Palmaria palmata (Linnaeus) F.Weber & D.Mohr, 1805 (synonym)
216. Species Ulva cavernosa Forsskål, 1775 accepted as Dictyosphaeria cavernosa (Forsskål) Børgesen, 1932 (synonym)
217. Species Ulva ciliata (Hudson) De Candolle, 1805 accepted as Calliblepharis ciliata (Hudson) Kützing, 1843
218. Species Ulva clathratioides L.G.Kraft, Kraft & R.F.Waller, 2010 accepted as Ulva torta (Mertens) Trevisan, 1842
219. Species Ulva clathrus (S.G.Gmelin) Woodward, 1797 accepted as Thalassiophyllum clathrus (S.G.Gmelin) Postels & Ruprecht, 1840 (synonym)
220. Species Ulva coccinea Poiret, 1808 accepted as Dudresnaya verticillata (Withering) Le Jolis, 1863 (synonym)
221. Species Ulva compressa Forsskål, 1775 accepted as Ulva compressa Linnaeus, 1753
222. Species Ulva confervoides Linnaeus, 1753 accepted as Ceramium virgatum Roth, 1797 (synonym)
223. Species Ulva confervoides Forsskål, 1775 accepted as Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 (synonym)
224. Species Ulva contorta (S.G.Gmelin) De Candolle, 1805 accepted as Dumontia contorta (S.G.Gmelin) Ruprecht, 1850 (synonym)
225. Species Ulva cornucopiae (Lyngbye) Trevisan accepted as Ulva intestinalis f. cornucopiae (Lyngbye) Sfriso & Curiel, 2007 (synonym)
226. Species Ulva cornucopiae (Lyngbye) Trevisan accepted as Ulva intestinalis f. cornucopiae (Lyngbye) Sfriso & Curiel, 2007 (synonym)
227. Species Ulva cornucopiae (Kützing) J.Agardh accepted as Ulva curvata (Kützing) De Toni, 1889
228. Species Ulva costata (M.Howe) Hollenberg, 1971 accepted as Ulva nematoidea Bory de Saint-Vincent, 1828 accepted as Ulva lactuca Linnaeus, 1753 (synonym)
229. Species Ulva crassa Kjellman, 1877 accepted as Ulva lactuca Linnaeus, 1753 (synonym)
230. Species Ulva crispa Lightfoot, 1777 accepted as Prasiola crispa (Lightfoot) Kützing, 1843 (synonym)
231. Species Ulva crispata Bertoloni, 1810 accepted as Ulva linza Linnaeus, 1753 (synonym)
232. Species Ulva cristata J.D.Hooker & Harvey, 1847 accepted as Prasiola cristata (J.D.Hooker & Harvey) J.Agardh, 1883 (synonym)
233. Species Ulva cylindrica Wahlenberg, 1812 accepted as Tetraspora cylindrica (Wahlenberg) C.Agardh, 1824
234. Species Ulva dactylifera Setchell & N.L.Gardner, 1920 accepted as Ulva taeniata (Setchell) Setchell & N.L.Gardner, 1920 (synonym)
235. Species Ulva decorticata Woodward, 1797 accepted as Codium decorticatum (Woodward) M.A.Howe, 1911 (synonym)
236. Species Ulva defracta Velley, 1796 accepted as Helminthonema defractum (Velley) Kützing, 1841 (synonym)
237. Species Ulva delicatula Gunnerus, 1772 accepted as Palmaria palmata (Linnaeus) F.Weber & D.Mohr, 1805 (synonym)
238. Species Ulva dichotoma Hudson, 1762 accepted as Dictyota dichotoma (Hudson) J.V.Lamouroux, 1809 (synonym)
239. Species Ulva divaricata Clemente, 1807 accepted as Sauvageaugloia divaricata (Clemente) Cremades, 1990
240. Species Ulva edulis (Stackhouse) Lyngbye, 1819 accepted as Dilsea carnosa (Schmidel) Kuntze, 1898 (synonym)
241. Species Ulva elminthoides (Velley) Withering, 1796 accepted as Nemalion elminthoides (Velley) Batters, 1902
242. Species Ulva fascia (O.F.Müller) Lyngbye, 1819 accepted as Petalonia fascia (O.F.Müller) Kuntze, 1898 (synonym)
243. Species Ulva fasciata Delile, 1813 accepted as Ulva lactuca Linnaeus, 1753 (synonym)
244. Species Ulva fasciata S.F.Gray, 1821 accepted as Ulva linza Linnaeus, 1753
245. Species Ulva fasciola (Roth) Martius, 1833 accepted as Dictyota fasciola (Roth) J.V.Lamouroux, 1809 (synonym)
246. Species Ulva fastigiata Clemente, 1807 accepted as Taonia atomaria f. ciliata (C.Agardh) Nizamuddin, 1981 accepted as Taonia pseudociliata (J.V.Lamouroux) Nizamuddin & Godeh, 1993 (synonym)
247. Species Ulva filiformis Hornemann, 1773 accepted as Dumontia contorta (S.G.Gmelin) Ruprecht, 1850 (synonym)
248. Species Ulva fistulosa Hudson, 1778 accepted as Asperococcus fistulosus (Hudson) W.J.Hooker, 1833 (synonym)
249. Species Ulva fluviatilis Sommerfelt, 1828 accepted as Prasiola fluviatilis (Sommerfelt) J.E. Areschoug ex Lagerstedt, 1869 (synonym)
250. Species Ulva foeniculacea (Hudson) C.Agardh, 1816 accepted as Dictyosiphon foeniculaceus (Hudson) Greville, 1830 (synonym)
251. Species Ulva fulvescens C.Agardh, 1823 accepted as Capsosiphon fulvescens (C.Agardh) Setchell & N.L.Gardner, 1920 (synonym)
252. Species Ulva furcellata Turner, 1801 accepted as Scinaia furcellata (Turner) J.Agardh, 1851 (synonym)
253. Species Ulva fusca Postels & Ruprecht, 1840 accepted as Ulvaria splendens (Ruprecht) K.L.Vinogradova, 1979
254. Species Ulva fusca Hudson, 1778 accepted as Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders, 2006 (synonym)
255. Species Ulva gelatinosa Vaucher, 1803 accepted as Tetraspora gelatinosa (Vaucher) Desvaux, 1818 (synonym)
256. Species Ulva glandiformis S.G.Gmelin, 1768 accepted as Halosaccion glandiforme (S.G.Gmelin) Ruprecht, 1850 (synonym)
257. Species Ulva godeyi Brébisson accepted as Tetraspora godeyi Kützing, 1846 (synonym)
258. Species Ulva grevillei (Thuret) Le Jolis, 1863 accepted as Monostroma grevillei (Thuret) Wittrock, 1866 (synonym)
259. Species Ulva hutchinensis Poiret, 1817 accepted as Nitophyllum punctatum (Stackhouse) Greville, 1830 (synonym)
260. Species Ulva incrassata O.F.Müller, 1775 accepted as Dumontia contorta (S.G.Gmelin) Ruprecht, 1850 (synonym)
261. Species Ulva incurvata Parriaud ex P.J.L.Dangeard, 1959 accepted as Ulva incurvata Parriaud, 1959 (synonym)
262. Species Ulva indica P.Anand, 1940 accepted as Ulva anandii Amjad & Shameel, 1993 (synonym)
263. Species Ulva insignis (Areschoug) Papenfuss, 1960 accepted as Letterstedtia insignis Areschoug, 1850 (synonym)
264. Species Ulva interrupta A.P.de Candolle, 1807 accepted as Scinaia interrupta (A.P.de Candolle) M.J.Wynne, 1989 (synonym)
265. Species Ulva interrupta Poiret, 1808 accepted as Scinaia interrupta (A.P.de Candolle) M.J.Wynne, 1989 (synonym)
266. Species Ulva intybacea Lamarck, 1779 accepted as Ulva linza Linnaeus, 1753 (synonym)
267. Species Ulva japonica (Holmes) Papenfuss, 1960 accepted as Umbraulva japonica (Holmes) Bae & I.K.Lee, 2001 (synonym)
268. Species Ulva jugoslavica (Bliding) Ballesteros, 2010 accepted as Ulva splitiana Alongi, Cormaci & Furnari, 2014
269. Species Ulva kuckuckiana Schmidt accepted as Ulva curvata (Kützing) De Toni, 1889 (synonym)
270. Species Ulva laciniata Lightfoot, 1777 accepted as Erythroglossum laciniatum (Lightfoot) Maggs & Hommersand, 1993 (synonym)
271. Species Ulva lacinulata (Kützing) Wittrock, 1882 accepted as Ulva lactuca var. lacinulata (Kützing) W.R.Taylor, 1960 (synonym)
272. Species Ulva lactucaefolia S.F.Gray, 1821 accepted as Ulva lactuca Linnaeus, 1753 (synonym)
273. Species Ulva laetevirens J.E.Areschoug, 1854 accepted as Ulva australis Areschoug, 1854
274. Species Ulva lanceolata Linnaeus, 1767 accepted as Ulva linza Linnaeus, 1753 (synonym)
275. Species Ulva latissima Linnaeus, 1753 accepted as Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders, 2006
276. Species Ulva latissima Gunnerus, 1766 accepted as Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders, 2006 (synonym)
277. Species Ulva ligulata Woodward, 1797 accepted as Halarachnion ligulatum (Woodward) Kützing, 1843 (synonym)
278. Species Ulva lingulata A.P.de Candolle, 1805 accepted as Hypoglossum hypoglossoides (Stackhouse) Collins & Hervey, 1917
279. Species Ulva linkiana (Greville) Trevisan, 1842 accepted as Ulva clathrata (Roth) C.Agardh, 1811 (synonym)
280. Species Ulva lobata (Kützing) Harvey, 1855 accepted as Ulva lactuca Linnaeus, 1753
281. Species Ulva longissima Gunnerus, 1776 accepted as Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders, 2006 (synonym)
282. Species Ulva lubrica Roth accepted as Tetraspora lubrica (Roth) C.Agardh, 1824 (synonym)
283. Species Ulva lumbricalis Linnaeus, 1771 accepted as Champia lumbricalis (Linnaeus) Desvaux, 1809 (synonym)
284. Species Ulva maxima Gunnerus, 1772 accepted as Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders, 2006 (synonym)
285. Species Ulva mediterranea Alongi, Cormaci & G.Furnari, 2014 accepted as Ulva aragoensis (Bliding) Maggs in Krupnik et al., 2018
286. Species Ulva membranacea (Stackh.) J.P.Jones & J.F.Kingston, 1829 accepted as Dictyopteris polypodioides (A.P.De Candolle) J.V.Lamouroux, 1809 (synonym)
287. Species Ulva mertensii C.Martius, 1828 accepted as Dictyota mertensii (C.Martius) Kützing, 1859 (synonym)
288. Species Ulva miniata (C.Agardh) Lyngbye, 1819 accepted as Wildemania miniata (C.Agardh) Foslie, 1891 (synonym)
289. Species Ulva montana Lightfoot, 1777 accepted as Microcystis sanguinea (C.Agardh) Kützing, 1833 accepted as Gloeocapsa sanguinea (C.Agardh) Kützing, 1843 (synonym)
290. Species Ulva multifida Turner, 1801 accepted as Cutleria multifida (Turner) Greville, 1830 (synonym)
291. Species Ulva multiramosa Taskin, 2012 accepted as Ulva polyclada Kraft, 2007
292. Species Ulva muscoides Clemente, 1807 accepted as Ulva clathrata (Roth) C.Agardh, 1811
293. Species Ulva mutabilis Föyn, 1958 (unaccepted)
294. Species Ulva neapolitana Bliding, 1960 (unaccepted)
295. Species Ulva nematoidea Bory de Saint-Vincent, 1828 (unaccepted)
296. Species Ulva nostoch A.P.de Candolle, 1807 (unaccepted)
297. Species Ulva obscura Kützing, 1843 (unaccepted, synonym)
298. Species Ulva olivacea P.J.L.Dangeard, 1951 (unaccepted, synonym)
299. Species Ulva olivacea Hornemann, 1810 (unaccepted, synonym)
300. Species Ulva olivaceum Hornemann, 1806-1810 (unaccepted, synonym)
301. Species Ulva olivascens P.J.L.Dangeard, 1961 (unaccepted, synonym)
302. Species Ulva oxycocca Kützing, 1845 (unaccepted, synonym)
303. Species Ulva oxysperma Kützing, 1843 (unaccepted, synonym)
304. Species Ulva palmata (Linnaeus) Withering, 1796 (unaccepted, synonym)
305. Species Ulva papillosa Linnaeus, 1771 (unaccepted, synonym)
306. Species Ulva pavonia (Linnaeus) Linnaeus, 1767 (unaccepted, synonym)
307. Species Ulva percursa (C.Agardh) C.Agardh, 1823 (unaccepted)
308. Species Ulva pertusa Kjellman, 1897 (unaccepted)
309. Species Ulva petiolata Turra, 1780 (unaccepted, synonym)
310. Species Ulva petiolata (J.Agardh) Womersley, 1956 (unaccepted, synonym)
311. Species Ulva phyllitis (Stackhouse) A.P.de Candolle, 1805 (unaccepted, synonym)
312. Species Ulva plantaginea Roth, 1800 (unaccepted, synonym)
313. Species Ulva plantaginifolia Wulfen, 1803 (unaccepted, synonym)
314. Species Ulva plumosa Hudson, 1778 (unaccepted, synonym)
315. Species Ulva polypodioides A.P.de Candolle, 1805 (unaccepted, synonym)
316. Species Ulva priapus S.G.Gmelin, 1768 (unaccepted, synonym)
317. Species Ulva procera (K.Ahlner) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003 (unaccepted, synonym)
318. Species Ulva protuberans Smith, 1814 (unaccepted, synonym)
319. Species Ulva punctata (Stackhouse) Stackhouse, 1797 (unaccepted)
320. Species Ulva purpurea Roth, 1797 (unaccepted, synonym)
321. Species Ulva purpureoviolacea Roth, 1788 (unaccepted, synonym)
322. Species Ulva quaternaria Kützing, 1856 (unaccepted, synonym)
323. Species Ulva ramosa Hudson, 1762 (unaccepted, synonym)
324. Species Ulva ramulosa Smith, 1810 (unaccepted, synonym)
325. Species Ulva rubescens Lyngbye, 1819 (unaccepted, synonym)
326. Species Ulva rubra Hudson, 1778 (unaccepted, synonym)
327. Species Ulva rugosa Linnaeus, 1771 (unaccepted, synonym)
328. Species Ulva scagelii Chihara, 1969 (unaccepted)
329. Species Ulva scandinavica Bliding, 1969 (unaccepted)
330. Species Ulva sericea Wulfen, 1803 (unaccepted)
331. Species Ulva sertolara (Bertoloni) Pollini, 1824 (unaccepted, synonym)
332. Species Ulva simplex (K.L.Vinogradova) H.S.Hayden, Blomster, Maggs, P.C.Silva, Stanhope & Waaland, 2003 (unaccepted)
333. Species Ulva simplicissima Clemente, 1807 (unaccepted, synonym)
334. Species Ulva sinuosa Mertens ex Roth, 1806 (unaccepted, synonym)
335. Species Ulva sobolifera (M.Vahl) Lyngbye, 1819 (unaccepted, synonym)
336. Species Ulva sobolifera Oeder, 1767 (unaccepted, synonym)
337. Species Ulva spathulata Papenfuss, 1960 (unaccepted, synonym)
338. Species Ulva splendens Ruprecht, 1850 (unaccepted, synonym)
339. Species Ulva spongiformis O.F.Müller, 1778 (unaccepted, synonym)
340. Species Ulva stellata Wulfen, 1787 (unaccepted, synonym)
341. Species Ulva stipitata J.E.Areschoug, 1850 (unaccepted, synonym)
342. Species Ulva tenera Kornmann & Sahling, 1994 (unaccepted)
343. Species Ulva terrestris Roth, 1797 (unaccepted, synonym)
344. Species Ulva tessellata J.D.Hooker & Harvey, 1845 (unaccepted, synonym)
345. Species Ulva thuretii B.Föyn, 1955 (unaccepted, synonym)
346. Species Ulva tomentosa (Hudson) De Candolle, 1805 (unaccepted, synonym)
347. Species Ulva turneri Dillwyn ex J.E.Smith, 1814 (unaccepted, synonym)
348. Species Ulva umbilicalis Linnaeus, 1753 (unaccepted, synonym)
349. Species Ulva umbilicata S.F.Gray, 1821 (unaccepted)
350. Species Ulva velutina (Lyngbye) Sommerfelt, 1826 (unaccepted, synonym)
351. Species Ulva ventricosa A.P.de Candolle, 1807 (unaccepted)
352. Species Ulva verticillata Withering, 1796 (unaccepted, synonym)
353. Species Ulva vexata Setchell & N.L.Gardner, 1920 (unaccepted, synonym)
354. Species Ulva aetherea Poiret (uncertain)
355. Species Ulva agarum (Gmelin) Poiret (uncertain)
356. Species Ulva agarum (Gmelin) Woodward (uncertain)
357. Species Ulva ampullacea Poiret, 1808 (uncertain)
358. Species Ulva aponina Meneghini (uncertain)
359. Species Ulva appendiculata Schousboe (uncertain)
360. Species Ulva attenuata (C.Agardh) Naccari, 1828 (uncertain)
361. Species Ulva belangeri (Montagne) De Toni, 1889 (uncertain)
362. Species Ulva billardierei Mertens ex C.Agardh (uncertain)
363. Species Ulva bursa (Linnaeus) Poiret (uncertain)
364. Species Ulva calophylla (Carm.) Sprengel (uncertain)
365. Species Ulva caudata Schousboe (uncertain)
366. Species Ulva cirrosa Schousboe (uncertain)
367. Species Ulva digitata (Linnaeus) De Candolle (uncertain)
368. Species Ulva elongata Schousboe (uncertain)
369. Species Ulva endiviaefolia Martius (uncertain)
370. Species Ulva filosa C.P.Thunberg (uncertain)
371. Species Ulva flava Forsskål, 1775 (uncertain)
372. Species Ulva halleri (De Candolle)Poiret (uncertain)
373. Species Ulva hendayensis Ballesteros, 2010 (uncertain)
374. Species Ulva imbricata Schousboe (uncertain)
375. Species Ulva implicata Schousboe (uncertain)
376. Species Ulva intricata Clemente, 1807 (uncertain)
377. Species Ulva ligula (Montagne ex Kützing) De Toni (uncertain)
378. Species Ulva melanoidea Schousboe (uncertain)
379. Species Ulva mesenteriformis Roth, 1795 (uncertain)
380. Species Ulva minuta Kützing (uncertain)
381. Species Ulva moccana J.F.Gmelin (uncertain)
382. Species Ulva mucosa Kützing (uncertain)
383. Species Ulva ocellata (J.V.Lamouroux) De Candolle, 1805 (uncertain)
384. Species Ulva papyracea Schleicher (uncertain)
385. Species Ulva papyracea Balbis (uncertain)
386. Species Ulva pentagonum Meneghini (uncertain)
387. Species Ulva planca Suhr, 1840 (uncertain)
388. Species Ulva purpurascens Hudson, 1778 (uncertain)
389. Species Ulva pusilla J.P.F.C.Montagne (uncertain)
390. Species Ulva radicata A.P.de Candolle (uncertain)
391. Species Ulva rubens Hudson, 1778 (uncertain)
392. Species Ulva saccharina (Linnaeus) De Candolle (uncertain)
393. Species Ulva sanguinea Bellardi (uncertain)
394. Species Ulva sordida Areschoug (uncertain)
395. Species Ulva tenella Kützing (uncertain)
396. Species Ulva tenella Lenormand ex Kützing (uncertain)
397. Species Ulva tenuissima Schousboe (uncertain)
398. Species Ulva tournefortii (J.V.Lamouroux) Pollini (uncertain)
399. Species Ulva tropica Mertens, 1819 (uncertain)
400. Species Ulva venusta Schousboe (uncertain)
401. Species Ulva vermicularis Schrank (uncertain)
402. Species Ulva vesiciformis Delarbre (uncertain)

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