| Hydrophyllaceae | |
Phacelia acanthominthoides
| Elmer | Bot. Gaz. 41(5): 309–310 | 1906 |
| Hydrophyllaceae | |
Phacelia acaulis
| (M. Martens & Galeotti) Brand | Pflanzenr. IV. 251(Heft 54): 67–68 | 1913 |
| Hydrophyllaceae | |
Phacelia adenophora
| J.T. Howell | Leafl. W. Bot. 4(1): 15 | 1944 |
| Hydrophyllaceae | |
Phacelia adspersa
| Brand | Repert. Spec. Nov. Regni Veg. 17(19–30): 319–320 | 1921 |
| Hydrophyllaceae | |
Phacelia affinis
| A. Gray | Syn. Fl. N. Amer. (ed. 2) 2(1): 417–418 | 1886 |
| Hydrophyllaceae | |
Phacelia alba
| Rydb. | Bull. Torrey Bot. Club 28(1): 30 | 1901 |
| Hydrophyllaceae | |
Phacelia aldersonii
| Greene | Pittonia 5(26A): 22 | 1902 |
| Hydrophyllaceae | |
Phacelia alpina
| Rydb. | Mem. New York Bot. Gard. 1: 324 | 1900 |
| Hydrophyllaceae | |
Phacelia altotonga
| B.L. Turner | Phytologia 71: 445 | 1992 |
| Hydrophyllaceae | |
Phacelia alvordensis
| M.E. Jones | Contr. W. Bot. 17: 30–31 | 1930 |
| Hydrophyllaceae | |
Phacelia amabilis
| Constance | Madroño 7(2): 56–59, pl. 3 | 1943 |
| Hydrophyllaceae | |
Phacelia ambigua
| M.E. Jones | Contr. W. Bot. 12: 52 | 1908 |
| Hydrophyllaceae | |
Phacelia ammophila
| Greene ex Brand | Univ. Calif. Publ. Bot. 4(13): 216 | 1912 |
| Hydrophyllaceae | |
Phacelia anelsonii
| J.F. Macbr. | Contr. Gray Herb. 49: 26 | 1917 |
| Hydrophyllaceae | |
Phacelia arenicola
| Brandegee | Univ. Calif. Publ. Bot. 4(11): 185–186 | 1911 |
| Hydrophyllaceae | |
Phacelia aretioides
| (Hook. & Arn.) A. Gray | Pacif. Railr. Rep. 5(4): 22 | 1860 |
| Hydrophyllaceae | |
Phacelia argentea
| A. Nelson & J.F. Macbr. | Bot. Gaz. 61(1): 34 | 1916 |
| Hydrophyllaceae | |
Phacelia argillacea
| N.D. Atwood | Phytologia 26(6): 437 | 1973 |
| Hydrophyllaceae | |
Phacelia argylensis
| N.D. Atwood & S.L. Welsh | Utah Fl. (ed. 3) 332–333 | 2003 |
| Hydrophyllaceae | |
Phacelia arizonica
| A. Gray | Syn. Fl. N. Amer. 1: 394 | 1878 |
| Hydrophyllaceae | |
Phacelia artemisioides
| Griseb. | Abh. Königl. Ges. Wiss. Göttingen 19: 230–231 | 1874 |
| Hydrophyllaceae | |
Phacelia arthurii
| Greene | Pittonia 1(15): 224 | 1888 |
| Hydrophyllaceae | |
Phacelia aucalis
| Brandegee | | |
| Hydrophyllaceae | |
Phacelia austromontana
| J.T. Howell | Leafl. W. Bot. 3(8): 190–191 | 1942 |
| Hydrophyllaceae | |
Phacelia austrotexana
| (J.A. Moyer) B.L. Turner | Phytoneuron 2010–21: 1 | 2010 |
| Hydrophyllaceae | |
Phacelia bakeri
| (Brand) J.F. Macbr. | Contr. Gray Herb. 49: 24 | 1917 |
| Hydrophyllaceae | |
Phacelia barnebyana
| J.T. Howell | Leafl. W. Bot. 3(8): 191–192 | 1942 |
| Hydrophyllaceae | |
Phacelia beatleyae
| Reveal & Constance | Brittonia 24(2): 199–201, f. 1 | 1972 |
| Hydrophyllaceae | |
Phacelia bicknellii
| Small | Bull. Torrey Bot. Club 25(3): 141 | 1898 |
| Hydrophyllaceae | |
Phacelia bicolor
| Torr. ex S. Watson | Botany (Fortieth Parallel) 255 | 1871 |
| Hydrophyllaceae | |
Phacelia biennis
| A. Nelson | Bull. Torrey Bot. Club 26(3): 132–133 | 1899 |
| Hydrophyllaceae | |
Phacelia bifurca
| Greene | Pittonia 5(26A): 18 | 1902 |
| Hydrophyllaceae | |
Phacelia biolettii
| Greene | Pittonia 5(26A): 23 | 1902 |
| Hydrophyllaceae | |
Phacelia bipinnatifida
| Michx. | Fl. Bor.-Amer. 1: 134, pl. 16 | 1803 |
| Hydrophyllaceae | |
Phacelia bolanderi
| A. Gray | Proc. Amer. Acad. Arts 10: 322 | 1875 |
| Hydrophyllaceae | |
Phacelia boliviana
| Brand | Pflanzenr. IV. 251(Heft 54): 77–78 | 1913 |
| Hydrophyllaceae | |
Phacelia bombycina
| Wooton & Standl. | Contr. U.S. Natl. Herb. 16(4): 163 | 1913 |
| Hydrophyllaceae | |
Phacelia boykinii
| (A. Gray) Small | Bull. Torrey Bot. Club 25(3): 136 | 1898 |
| Hydrophyllaceae | |
Phacelia brachyantha
| Benth. | Trans. Linn. Soc. London 17: 279 | 1837 |
| Hydrophyllaceae | |
Phacelia brachyloba
| (Benth.) A. Gray | Proc. Amer. Acad. Arts 10: 324 | 1875 |
| Hydrophyllaceae | |
Phacelia brannanii
| Kellogg | Proc. Calif. Acad. Sci. 7: 90 | 1876 [1877] |
| Hydrophyllaceae | |
Phacelia brevistylis
| Buckley | Amer. J. Sci. Arts 45(1): 172 | 1843 |
| Hydrophyllaceae | |
Phacelia breweri
| A. Gray | Proc. Amer. Acad. Arts 10: 317–318 | 1875 |
| Hydrophyllaceae | |
Phacelia buell-vivariensis
| N.D. Atwood | Novon 17(4): 404–406, f. 1 | 2007 |
| Hydrophyllaceae | |
Phacelia burkei
| Rydb. | Bull. Torrey Bot. Club 36(12): 675–676 | 1909 |
| Hydrophyllaceae | |
Phacelia californica
| Cham. | Linnaea 4(4): 494 | 1829 |
| Hydrophyllaceae | |
Phacelia calthifolia
| Brand | Konigl. Gymnasium Sorau, Beil. Jahresber. 8–9 | 1911 |
| Hydrophyllaceae | |
Phacelia campanularia
| A. Gray | Syn. Fl. N. Amer. 2(1): 164 | 1878 |
| Hydrophyllaceae | |
Phacelia campestris
| A. Nelson | Bull. Torrey Bot. Club 26(5): 242 | 1899 |
| Hydrophyllaceae | |
Phacelia canescens
| Nutt. | Proc. Acad. Nat. Sci. Philadelphia 4(1): 13 | 1848 |
| Hydrophyllaceae | |
Phacelia capitata
| Kruckeb. | Madroño 13(7): 209–213, f. 1 | 1956 |
| Hydrophyllaceae | |
Phacelia carmenensis
| B.L. Turner | Phytologia 71: 447 | 1992 |
| Hydrophyllaceae | |
Phacelia cedrosensis
| Rose | Contr. U.S. Natl. Herb. 1(2): 18 | 1890-1895 [1890] |
| Hydrophyllaceae | |
Phacelia cephalotes
| A. Gray | Proc. Amer. Acad. Arts 10: 325–326 | 1875 |
| Hydrophyllaceae | |
Phacelia cicutaria
| Greene | Pittonia 5(26A): 20–21 | 1902 |
| Hydrophyllaceae | ! |
Phacelia ciliata
| Benth. | Trans. Linn. Soc. London 17(2): 280 | 1835 |
| Hydrophyllaceae | ** |
Phacelia ciliata
| Raf. ex Brand | Pflanzenr. IV. 251: 62 | 1913 |
| Hydrophyllaceae | |
Phacelia ciliosa
| (Rydb.) Rydb. | Bull. Torrey Bot. Club 33(3): 149 | 1906 |
| Hydrophyllaceae | |
Phacelia cinerea
| Eastw. ex J.F. Macbr. | Contr. Gray Herb. 49: 26–27 | 1917 |
| Hydrophyllaceae | * |
Phacelia circinata
| (Willd.) J. Jacq. | Ecl. Pl. Rar. 1(9–10): 135, t. 95 | 1816 |
| Hydrophyllaceae | * |
Phacelia circinatiformis
| A. Gray | Proc. Amer. Acad. Arts 10: 325 | 1875 |
| Hydrophyllaceae | |
Phacelia cliffordii
| N.D. Atwood & S.L. Welsh | W. N. Amer. Naturalist 73(1): 114 | 2013 |
| Hydrophyllaceae | |
Phacelia clinopodioides
| Bertero | Amer. J. Sci., ser. 4 xxiii: 263 | 1833 |
| Hydrophyllaceae | |
Phacelia cloudcroftensis
| N.D. Atwood | Novon 17(4): 406–408, f. 2 | 2007 |
| Hydrophyllaceae | |
Phacelia coerulea
| Greene | Bull. Torrey Bot. Club 8(11): 122 | 1881 |
| Hydrophyllaceae | |
Phacelia commixta
| Greene | Pittonia 5(26A): 21–22 | 1902 |
| Hydrophyllaceae | ** |
Phacelia compacta
| (Brand) Greene ex J.T. Howell | Amer. Midl. Naturalist 30(1): 19 | 1943 |
| Hydrophyllaceae | ** |
Phacelia compacta
| Greene ex C.F. Baker | W. Amer. Pl. 1: 18 | 1902 |
| Hydrophyllaceae | * |
Phacelia conferta
| G. Don | Gen. Hist. 4: 397 | 1837 |
| Hydrophyllaceae | |
Phacelia congdonii
| Greene | Pittonia 5(26A): 22 | 1902 |
| Hydrophyllaceae | |
Phacelia congesta
| Hook. | Bot. Mag. 62: pl. 3452 | 1835 |
| Hydrophyllaceae | |
Phacelia constancei
| N.D. Atwood | Rhodora 74(800): 451–454, f. 1, map 1 | 1972 |
| Hydrophyllaceae | |
Phacelia cookei
| Constance & Heckard | Brittonia 22(1): 25–27, f. 1 | 1970 |
| Hydrophyllaceae | |
Phacelia cooperae
| A. Gray | Proc. Amer. Acad. Arts 15(1): 49 | 1880 [1879] |
| Hydrophyllaceae | |
Phacelia corrugata
| A. Nelson | Bot. Gaz. 34(1): 26–27 | 1902 |
| Hydrophyllaceae | |
Phacelia corymbosa
| Jeps. | Man. Fl. Pl. Calif. 820 | 1925 |
| Hydrophyllaceae | |
Phacelia cottamii
| N.D. Atwood | Utah Fl. (ed. 3) 333 | 2003 |
| Hydrophyllaceae | |
Phacelia coulteri
| Greenm. | Proc. Amer. Acad. Arts 41: 241 | 1906 [1905] |
| Hydrophyllaceae | |
Phacelia covillei
| S. Watson | Manual (ed. 6) 360 | 1890 |
| Hydrophyllaceae | |
Phacelia crassifolia
| Torr. ex S. Watson | Botany (Fortieth Parallel) 255–256 | 1871 |
| Hydrophyllaceae | |
Phacelia crenulata
| Torr. ex S. Watson | Botany (Fortieth Parallel) 251 | 1871 |
| Hydrophyllaceae | |
Phacelia cronquistiana
| S.L. Welsh | Rhodora 95(883/884): 402, f. 9 | 1993 |
| Hydrophyllaceae | |
Phacelia cryptantha
| Greene | Pittonia 5(26A): 21 | 1902 |
| Hydrophyllaceae | |
Phacelia cumingii
| (Benth.) A. Gray | Syn. Fl. N. Amer. 2(1): 169 | 1878 |
| Hydrophyllaceae | |
Phacelia curvipes
| Torr. ex S. Watson | Botany (Fortieth Parallel) 252–253 | 1871 |
| Hydrophyllaceae | |
Phacelia dalesiana
| J.T. Howell | Leafl. W. Bot. 2(4): 51–52 | 1937 |
| Hydrophyllaceae | ** |
Phacelia dasyphylla
| Greene ex C.F. Baker | W. Amer. Pl. 3: 9 | 1904 |
| Hydrophyllaceae | |
Phacelia dasyphylla
| Greene ex J.F. Macbr. | Contr. Gray Herb. 49: 35 | 1917 |
| Hydrophyllaceae | |
Phacelia davidsonii
| A. Gray | Proc. Amer. Acad. Arts 10: 324 | 1875 |
| Hydrophyllaceae | |
Phacelia decumbens
| Greene | Pittonia 5(26A): 17–18 | 1902 |
| Hydrophyllaceae | |
Phacelia demissa
| A. Gray | Proc. Amer. Acad. Arts 10: 326 | 1875 |
| Hydrophyllaceae | |
Phacelia denticulata
| Osterh. | Torreya 16(3): 70–71 | 1916 |
| Hydrophyllaceae | |
Phacelia depauperata
| Wooton & Standl. | Contr. U.S. Natl. Herb. 16(4): 163 | 1913 |
| Hydrophyllaceae | |
Phacelia deserta
| A. Nelson | Bull. Torrey Bot. Club 25(5): 277–278 | 1898 |
| Hydrophyllaceae | |
Phacelia dissecta
| (A. Gray) Small | Fl. S.E. U.S. 972 | 1903 |
| Hydrophyllaceae | |
Phacelia distans
| Benth. | Bot. Voy. Sulphur 36–37 | 1844 |
| Hydrophyllaceae | |
Phacelia divaricata
| (Benth.) A. Gray | Proc. Amer. Acad. Arts 10: 325 | 1875 |
| Hydrophyllaceae | |
Phacelia dociana
| Jeps. & Hoover | Fl. Calif. 3(2): 254–255, f. 402 | 1943 |
| Hydrophyllaceae | |
Phacelia douglasii
| (Benth.) Torr. | Rep. U.S. Mex. Bound. 2(1): 143 | 1859 |
| Hydrophyllaceae | |
Phacelia dubia
| (L.) Trel. | Rep. (Annual) Arkansas Geol. Surv. 4: 205 | 1888 [1891] |