| Rubiaceae | |
Knoxia brachycarpa
| R. Br. ex Hook. f. | Fl. Brit. India 3: 130 | 1880 |
| Rubiaceae | |
Knoxia brasiliensis
| Spreng. | Syst. Veg. [Sprengel] 1: 406 | 1825 [1824] |
| Rubiaceae | |
Knoxia congesta
| Pit. | Fl. Indo-Chine 3: 286 | 1923 |
| Rubiaceae | * |
Knoxia corymbosa
| Thwaites | Enum. Pl. Zeyl. 151 | 1859 |
| Rubiaceae | |
Knoxia corymbosa
| Willd. | Sp. Pl. 1: 582 | 1797 |
| Rubiaceae | |
Knoxia dichotoma
| Willd. ex Roem. & Schult. | Syst. Veg. 3: 532 | 1818 |
| Rubiaceae | * |
Knoxia exaltata
| Griff. | Itin. Pl. Khasyah Bootan Mts., Affghanisthan, etc. 96 | 1848 |
| Rubiaceae | |
Knoxia exserta
| DC. | Prodr. 4: 569 | 1830 |
| Rubiaceae | * |
Knoxia glabra
| DC. | Prodr. 4: 569–570 | 1830 |
| Rubiaceae | |
Knoxia hedyotoidea
| (K. Schum.) Puff & Robbr. | Bot. Jahrb. Syst. 110: 548 | 1989 |
| Rubiaceae | |
Knoxia heyneana
| DC. | Prodr. 4: 570 | 1830 |
| Rubiaceae | |
Knoxia hirsuta
| Arn. | Nov. Actorum Acad. Caes. Leop.-Carol. Nat. Cur. 18: 344 | 1836 |
| Rubiaceae | |
Knoxia hookeri
| Lakshmin. | Harvard Pap. Bot. 23(2): 333 | 2018 |
| Rubiaceae | ** |
Knoxia hookeriana
| (R.Bhattacharjee & Deb) Subba Rao & Kumari | Fl. Visakhapatnam Distr. 1: 404 | 2003 |
| Rubiaceae | * |
Knoxia laevis
| (Roxb.) DC. | Prodr. 4: 570 | 1830 |
| Rubiaceae | |
Knoxia linearis
| Gamble | Bull. Misc. Inform. Kew 1920: 68 | 1920 |
| Rubiaceae | |
Knoxia linearis
| Gamble. | | |
| Rubiaceae | |
Knoxia lineata
| DC. | Prodr. 4: 570 | 1830 |
| Rubiaceae | |
Knoxia longituba
| Franch. | Sert. Somal. 32 | 1882 |
| Rubiaceae | |
Knoxia manika
| (Verdc.) Puff & Robbr. | Bot. Jahrb. Syst. 110: 548 | 1989 |
| Rubiaceae | |
Knoxia microcarpa
| Kurz | J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 46(2): 138 | 1877 |
| Rubiaceae | |
Knoxia microphylla
| Franch. | 33. | |
| Rubiaceae | |
Knoxia mollis
| Wight & Arn. | Prodr. Fl. Ind. Orient. 439 | 1834 |
| Rubiaceae | |
Knoxia plantaginea
| Wall. | Pl. Asiat. Rar. 1: 27 | 1830 |
| Rubiaceae | |
Knoxia platycarpa
| Arn. | Nova Acta Acad. Caes. Leop.-Carol. German. Nat. Cur. 18: 344 | 1836 |
| Rubiaceae | |
Knoxia purpurea
| (L.) Lam. ex Poir. | Encycl. Suppl. 3: 225 | 1813 |
| Rubiaceae | |
Knoxia rosettifolia
| Geddes | Bull. Misc. Inform. Kew 1927(4): 172 | 1927 |
| Rubiaceae | ! |
Knoxia roxburghii
| (Spreng.) M.A. Rau | Bull. Bot. Surv. India 10(Suppl. 2): 40 | 1969 |
| Rubiaceae | |
Knoxia senegalensis
| (Cham. & Schltdl.) Rchb. ex Oliv. | Fl. Trop. Afr. 3: 56 | 1877 |
| Rubiaceae | |
Knoxia simplex
| Willd. | Syst. Veg. 3: 532 | 1818 |
| Rubiaceae | |
Knoxia spicata
| (Thwaites ex Trimen) Ridsdale | Blumea 41(2): 457 | 1996 |
| Rubiaceae | |
Knoxia stricta
| Gaertn. | Fruct. Sem. Pl. 1: 122 | 1788 |
| Rubiaceae | * |
Knoxia stricta
| Thwaites | Enum. Pl. Zeyl. 152 | 1859 |
| Rubiaceae | * |
Knoxia stricta
| Miq. | Ann. Mus. Bot. Lugduno-Batavi 4: 260 | 1869 |
| Rubiaceae | ! |
Knoxia sumatrensis
| (Retz.) DC. | Prodr. 4: 569 | 1830 |
| Rubiaceae | |
Knoxia teres
| (Roxb.) R. Br. | Numer. List 819 | 1829 |
| Rubiaceae | ** |
Knoxia teres
| (Roxb.) DC. | Prodr. 4: 569 | 1830 |
| Rubiaceae | ** |
Knoxia umbellata
| Banks ex Roxb. | Fl. Ind. 1: 373 | 1820 |
| Rubiaceae | |
Knoxia umbellata
| Banks ex Spreng. | Syst. Veg. [Sprengel] 1: 406 | 1825 [1824] |
| Rubiaceae | |
Knoxia umbellifera
| Roxb. ex Wight & Arn. | Prodr. Fl. Ind. Orient. 440 | 1834 |
| Rubiaceae | |
Knoxia valerianoides
| Thorel ex Pit. | Fl. Indo-Chine 3: 288 | 1923 |
| Rubiaceae | ** |
Knoxia veronicoides
| Drake | Hist. Phys. Madagascar 36: t. 441 | 1897 |
| Rubiaceae | |
Knoxia wallichii
| L.Bruce ex Panigrahi | Bull. Bot. Soc. Bengal 21: 29 | 1967 |
| Rubiaceae | ** |
Knoxia wightiana
| Schltdl. | Fl. Brit. India 3: 51 | 1880 |
| Rubiaceae | ** |
Knoxia wightiana
| Wall. ex G. Don | Gen. Hist. 3: 629 | 1834 |
| Rubiaceae | |
Knoxia wightiana
| Wall. ex Wight & Arn. | Prodr. Fl. Ind. Orient. 1: 440 | 1834 |
| Rubiaceae | |
Knoxia zeylanica
| L. | Sp. Pl. 1: 101 | 1753 |