| Plantaginaceae | |
Achetaria | Cham. & Schltdl. | Linnaea 2: 566 | 1827 |
| Plantaginaceae | ! |
Achetaria scutellarioides | (Benth.) Kuntze | Revis. Gen. Pl. 2: 456 | 1891 |
| Orobanchaceae | ! |
Agalinis | Raf. | New Fl. 2: 61–65 | 1836 [1837] |
| Orobanchaceae | |
Agalinis hispidula | (Mart.) D'Arcy | Ann. Missouri Bot. Gard. 65(2): 770 | 1978 [1979] |
| Orobanchaceae | |
Agalinis maritima | (Raf.) Raf. | New Fl. 2: 62 | 1836 [1837] |
| Orobanchaceae | |
Agalinis peduncularis | (Benth.) Pennell | Rhodora 20(236): 135 | 1918 |
| Orobanchaceae | |
Agalinis purpurea var. chiapensis | Pennell | Proc. Acad. Nat. Sci. Philadelphia 81(2): 169 | 1929 |
| Orobanchaceae | |
Agalinis spiciflora | (Engelm.) Pennell | Proc. Acad. Nat. Sci. Philadelphia 71(6): 277 | 1919 [1920] |
| Plantaginaceae | |
Allophyton evolutum | (Donn. Sm.) Pennell | Proc. Acad. Nat. Sci. Philadelphia 77: 271 | 1925 |
| Plantaginaceae | |
Allophyton megaphyllum | Brandegee | Univ. Calif. Publ. Bot. 6(4): 62 | 1914 |
| Plantaginaceae | |
Allophyton mexicanum | (Benth.) Pennell | Proc. Acad. Nat. Sci. Philadelphia 77: 271 | 1925 |
| Betulaceae | ! |
Alnus | Mill. | Gard. Dict. Abr. (ed. 4) vol. 1 | 1754 |
| Betulaceae | |
Alnus acuminata | Kunth | Nov. Gen. Sp. (quarto ed.) 2: 20 | 1817 |
| Betulaceae | |
Alnus acuminata subsp. arguta | (Schltdl.) Furlow | Ann. Missouri Bot. Gard. 63(2): 380 | 1976 [1977] |
| Betulaceae | |
Alnus arguta | (Schltdl.) Spach | Ann. Sci. Nat., Bot., sér. 2, 15: 205 | 1841 |
| Betulaceae | |
Alnus castaneifolia | Mirb. | Mém. Mus. Hist. Nat. 14: 463–464, t. 2 | 1827 |
| Betulaceae | |
Alnus ferruginea | Kunth | Nov. Gen. Sp. (quarto ed.) 2: 21 | 1817 |
| Betulaceae | |
Alnus firmifolia | Fernald | Proc. Amer. Acad. Arts 43(2): 61 | 1907 |
| Betulaceae | |
Alnus guatemalensis | Gand. | Bull. Soc. Bot. France 66(7): 289 | 1919 [1920] |
| Betulaceae | ! |
Alnus jorullensis | Kunth | Nov. Gen. Sp. (quarto ed.) 2: 20 | 1817 |
| Betulaceae | |
Alnus jorullensis subsp. lutea | Furlow | Ann. Missouri Bot. Gard. 63(2): 381 | 1976 [1977] |
| Betulaceae | |
Alnus mirbelii | Spach | Ann. Sci. Nat., Bot., sér. 2, 15: 204 | 1841 |
| Betulaceae | |
Alnus ovalifolia | Bartlett | Proc. Amer. Acad. Arts 44(21): 611–612 | 1909 |
| Betulaceae | |
Alnus pringlei | Fernald | Proc. Amer. Acad. Arts 43(2): 62 | 1907 |
| Scrophulariaceae | |
Alonsoa | Ruiz & Pav. | Syst. Veg. Fl. Peruv. Chil. 150–151 | 1798 |
| Scrophulariaceae | |
Alonsoa caulialata | Ruiz & Pav. | Syst. Veg. Fl. Peruv. Chil. 152 | 1798 |
| Scrophulariaceae | |
Alonsoa incisifolia | Ruiz & Pav. | Syst. Veg. Fl. Peruv. Chil. 1: 154 | 1798 |
| Scrophulariaceae | |
Alonsoa meridionalis | (L. f.) Kuntze | Revis. Gen. Pl. 2: 457 | 1891 |
| Scrophulariaceae | |
Alonsoa mutisii | (Kunth) G. Don | Gen. Hist. 4: 513 | 1837 |
| Scrophulariaceae | |
Alonsoa parviflora | (Kunth) G. Don | Gen. Hist. 4: 513 | 1837 |
| Scrophulariaceae | |
Alonsoa serrata | Pennell | Proc. Acad. Nat. Sci. Philadelphia 72: 167 | 1920 |
| Scrophulariaceae | |
Alonsoa urticifolia | Steud. | Nomencl. Bot. (ed. 2) 61 | 1840 |
| Plantaginaceae | |
Amphianthus | Torr. | Ann. Lyceum Nat. Hist. New York 4(1): 82–83 | 1837 |
| Linderniaceae | |
Amphiolanthus | Griseb. | Cat. Pl. Cub. 186 | 1866 |
| Linderniaceae | |
Anagalloides | Krock. | Fl. Siles. 2(1): 398 | 1790 |
| Gesneriaceae | ** |
Anetanthus parviflorus | (Hook. & Arn.) Benth. & Hook. ex Jackson | Index Kew. 1: 133 | 1893 |
| Plantaginaceae | |
Angelonia | Bonpl. | Pl. Aequinoct. 2(14): 92–94, pl. 108 | 1809 [1812] |
| Plantaginaceae | |
Angelonia angustifolia | Benth. | Prodr. 10: 254 | 1846 |
| Plantaginaceae | |
Angelonia ciliaris | B.L. Rob. | Proc. Amer. Acad. Arts 45(17): 400–401 | 1910 |
| Plantaginaceae | |
Angelonia parviflora | Barringer | | |
| Orobanchaceae | |
Anisantherina | Pennell | Mem. Torrey Bot. Club 16(2): 106 | 1920 |
| Orobanchaceae | |
Anisantherina hispidula | (Mart.) Pennell | Mem. Torrey Bot. Club 16(2): 106 | 1920 |
| Scrophulariaceae | * |
Anisocalyx | Hance ex Walp. | Ann. Bot. Syst. 3: 195 | 1852 |
| Incertae sedis | * |
Anonymos umbrosa | Walter | Fl. Carol. 63 | 1788 |
| Antirrhinaceae | |
Antirrhinaceae | Pers. | Syn. Pl. 2: 154, 640 | 1807 |
| Plantaginaceae | ! |
Antirrhinum | L. | Sp. Pl. 2: 612–618 | 1753 |
| Plantaginaceae | |
Antirrhinum cymbalaria | L. | Sp. Pl. 2: 612 | 1753 |
| Plantaginaceae | * |
Antirrhinum hederaceum | (L.) Lam. | Fl. Franç. 2: 338 | 1778 [1779] |
| Plantaginaceae | * |
Antirrhinum hederifolium | (L.) Salisb. | Prodr. Stirp. Chap. Allerton 96 | 1796 |
| Plantaginaceae | |
Antirrhinum majus | L. | Sp. Pl. 2: 617 | 1753 |
| Aragoaceae | |
Aragoaceae | D. Don | Edinburgh New Philos. J. 19: 109, 113 | 1835 |
| Plantaginaceae | |
Asarina barclaiana | (Lindl.) Pennell | Proc. Acad. Nat. Sci. Philadelphia 99(7): 174 | 1947 |
| Plantaginaceae | |
Asarina erubescens | (D. Don) Pennell | Proc. Acad. Nat. Sci. Philadelphia 99(7): 174 | 1947 |
| Plantaginaceae | * |
Asarina lophospermum | (L.H. Bailey) Pennell | Proc. Acad. Nat. Sci. Philadelphia 99(7): 175 | 1947 |
| Plantaginaceae | |
Asarina purpusii | (Brandegee) Pennell | Proc. Acad. Nat. Sci. Philadelphia 99(7): 175 | 1947 |
| Plantaginaceae | |
Asarina scandens | (Cav.) Pennell | Proc. Acad. Nat. Sci. Philadelphia 99(7): 175 | 1947 |
| Plantaginaceae | ! |
Bacopa | Aubl. | Hist. Pl. Guiane 1: 128–130, pl. 49 | 1775 |
| Plantaginaceae | |
Bacopa acuta | (S. Moore) Pennell | Proc. Acad. Nat. Sci. Philadelphia 98: 92 | 1946 |
| Plantaginaceae | |
Bacopa auriculata | (B.L. Rob.) Greenm. | Publ. Field Columb. Mus., Bot. Ser. 2(6): 262 | 1907 |
| Plantaginaceae | |
Bacopa axillaris | (Benth.) Standl. | J. Wash. Acad. Sci. 15(20): 460 | 1925 |
| Plantaginaceae | |
Bacopa bacopoides | (Benth.) Pulle | Enum. Vasc. Pl. Surinam 415 | 1906 |
| Plantaginaceae | |
Bacopa beccabunga | (Griseb.) B.L. Rob. | Proc. Amer. Acad. Arts 44(21): 614 | 1909 |
| Plantaginaceae | ! |
Bacopa bracteolata | Pennell ex Standl. | Contr. U.S. Natl. Herb. 27: 336 | 1928 |
| Plantaginaceae | * |
Bacopa chamaedryoides | Cook & Coll. | Contr. U.S. Natl. Herb. 8: 88 | 1903 |
| Plantaginaceae | |
Bacopa conferta | (Pennell) Standl. | Publ. Field Mus. Nat. Hist., Bot. Ser. 11(5): 174 | 1936 |
| Plantaginaceae | |
Bacopa curtipes | Standl. & L.O. Williams | Ceiba 3(2): 129 | 1952 |
| Plantaginaceae | ! |
Bacopa decumbens | (Fernald) F.N. Williams | Bull. Herb. Boissier, sér. 2, 7: 369 | 1907 |
| Plantaginaceae | |
Bacopa egensis | (Poepp.) Pennell | Proc. Acad. Nat. Sci. Philadelphia 98(2): 96 | 1946 |
| Plantaginaceae | |
Bacopa humilis | (Pennell) Standl. | J. Wash. Acad. Sci. 15(20): 460 | 1925 |
| Plantaginaceae | |
Bacopa lacertosa | Pennell ex Standl. | Publ. Field Mus. Nat. Hist., Bot. Ser. 11(4): 140–141 | 1932 |
| Plantaginaceae | |
Bacopa laxiflora | (Benth.) Wettst. ex Edwall | Bol. Commiss. Geogr. Estado Sao Paulo 13: 176, 180 | 1897 |
| Plantaginaceae | |
Bacopa laxiflora var. scabra | Edwall | Bol. Commiss. Geogr. Estado Sao Paulo 12: 180 | 1897 |
| Plantaginaceae | |
Bacopa lilacina | (Pennell) Standl. | Publ. Field Mus. Nat. Hist., Bot. Ser. 11(5): 174 | 1936 |
| Plantaginaceae | |
Bacopa limosa | (Pennell) Standl. | J. Wash. Acad. Sci. 15(20): 460 | 1925 |
| Plantaginaceae | |
Bacopa longipes | (Pennell) Standl. | Publ. Field Mus. Nat. Hist., Bot. Ser. 11(4): 141 | 1932 |
| Plantaginaceae | ! |
Bacopa monnieri | (L.) Wettst. | Nat. Pflanzenfam. 4(3b): 77 | 1891 |
| Plantaginaceae | * |
Bacopa monnieria | Hayata & Matsum. | J. Coll. Sci. Imp. Univ. Tokyo 22: 277 | 1906 |
| Plantaginaceae | |
Bacopa monnierioides | (Cham.) B.L. Rob. | Proc. Amer. Acad. Arts 44(21): 614 | 1909 |
| Plantaginaceae | |
Bacopa montevidensis | (Spreng.) Hert. & Melchior | Revista Sudamer. Bot. 4: 191 | 1937 |
| Plantaginaceae | |
Bacopa naias | Standl. | Publ. Field Mus. Nat. Hist., Bot. Ser. 11(4): 141 | 1932 |
| Plantaginaceae | ! |
Bacopa parviflora | Pennell ex Standl. | Contr. U.S. Natl. Herb. 27: 336 | 1928 |
| Plantaginaceae | |
Bacopa procumbens | (Mill.) Greenm. | Publ. Field Columb. Mus., Bot. Ser. 2(6): 261–262 | 1907 |
| Plantaginaceae | |
Bacopa procumbens var. schottii | Greenm. | Publ. Field Columb. Mus., Bot. Ser. 2(6): 262 | 1907 |
| Plantaginaceae | |
Bacopa punctata | Pennell | Fieldiana, Bot. 28: 516 | 1953 |
| Plantaginaceae | |
Bacopa ranaria | Benth. ex Chodat & Hassl. | Bull. Herb. Boissier, sér. 2, 4(3): 288 | 1904 |
| Plantaginaceae | |
Bacopa reflexa | (Benth.) Edwall | Bol. Commiss. Geogr. Estado Sao Paulo 13: 176 | 1897 |
| Plantaginaceae | |
Bacopa repens | (Sw.) Wettst. | Nat. Pflanzenfam. 4(3b): 76 | 1891 |
| Plantaginaceae | ! |
Bacopa salzmannii | (Benth.) Wettst. ex Edwall | Bol. Commiss. Geogr. Estado Sao Paulo 13: 176, 181–182 | 1897 |
| Plantaginaceae | |
Bacopa salzmannii var. coerulea | Beauverd | Bull. Herb. Boissier, sér. 2, 7: 701 | 1907 |
| Plantaginaceae | ! |
Bacopa sessiliflora | (Benth.) Edwall | Bol. Commiss. Geogr. Estado Sao Paulo 13: 175 | 1897 |
| Plantaginaceae | |
Bacopa violacea | (Pennell) Standl. | J. Wash. Acad. Sci. 15(20): 460 | 1925 |
| Balsaminaceae | ! |
Balsamina | Mill. | Gard. Dict. Abr. (ed. 4) | 1754 |
| Balsaminaceae | * |
Balsamina hortensis | Desp. | Dict. Sci. Nat. (ed. 2) 3: 485–486 | 1816 [1817] |
| Balsaminaceae | |
Balsaminaceae | A. Rich. | Dict. Class. Hist. Nat. 2: 173 | 1822 |
| Plantaginaceae | ** |
Beccabunga | Hill | Brit. Herb. 94 | 1756 |
| Plantaginaceae | |
Benjaminia | Mart. ex Benj. | Fl. Bras. 10: 255–256, t. 12, f. 4 | 1847 |
| Plantaginaceae | |
Benjaminia reflexa | (Benth.) D'Arcy | Ann. Missouri Bot. Gard. 66(2): 194 | 1979 |
| Plantaginaceae | |
Benjaminia utriculariiformis | Mart. ex Benj. | Fl. Bras. 10: 256, t. 12, f. 4 | 1847 |
| Phrymaceae | * |
Berendtia | A. Gray | Proc. Amer. Acad. Arts 7(2): 379–380 | 1868 |
| Phrymaceae | |
Berendtia ghiesbrechtii | A. Gray | Proc. Amer. Acad. Arts 7(2): 380 | 1868 |