| Rubiaceae | |
Pachystigma albosetulosum
| Verdc. | Kew Bull. 42: 139 | 1987 |
| Rubiaceae | |
Pachystigma ancylanthum
| (Schweinf. ex Hiern) K. Schum. | Pflanzenw. Ost-Afrikas C: 387 | 1895 |
| Rubiaceae | |
Pachystigma bicolor
| De Wild. | Pl. Bequaert. 3: 179 | 1925 |
| Rubiaceae | |
Pachystigma bowkeri
| Robyns | | |
| Rubiaceae | |
Pachystigma burttii
| Verdc. | Kew Bull. 36: 545 | 1981 |
| Rubiaceae | |
Pachystigma caffrum
| Robyns | | |
| Rubiaceae | |
Pachystigma cienkowskii
| (Schweinf.) Burtt Davy | Ann. Transvaal Mus. 3: 122 | 1912 |
| Rubiaceae | |
Pachystigma coeruleum
| Robyns | | |
| Rubiaceae | |
Pachystigma cymosum
| Robyns | | |
| Rubiaceae | |
Pachystigma decussatum
| K. Schum. | Pflanzenw. Ost-Afrikas C: 387 | 1895 |
| Rubiaceae | |
Pachystigma dichrophyllum
| Mildbr. | Notizbl. Bot. Gart. Berlin-Dahlem 9: 204 | 1924 |
| Rubiaceae | |
Pachystigma fuchsioides
| (Oliv.) K. Schum. | Pflanzenw. Ost-Afrikas C: 387 | 1895 |
| Rubiaceae | |
Pachystigma gillettii
| (Tennant) Verdc. | Kew Bull. 42: 140 | 1987 |
| Rubiaceae | |
Pachystigma humile
| Bews | | |
| Rubiaceae | |
Pachystigma humilis
| (J.M. Wood & M.S. Evans) Bews | Fl. Natal Zululand 198 | 1921 |
| Rubiaceae | |
Pachystigma kenyense
| Verdc. | Kew Bull. 36: 542, f. 10 | 1981 |
| Rubiaceae | |
Pachystigma lasianthum
| Sond. | Linnaea 23: 55 | 1850 |
| Rubiaceae | |
Pachystigma lateritica
| (K. Krause) Eyles | Trans. Roy. Soc. South Africa 5: 494 | 1916 |
| Rubiaceae | |
Pachystigma latifolium
| Sond. | Gärtn.-Bot. Briefe xxiii (1850) 56. | 1850 |
| Rubiaceae | |
Pachystigma loranthifolium
| (K. Schum.) Verdc. | Kew Bull. 42: 140 | 1987 |
| Rubiaceae | |
Pachystigma macrocalyx
| Robyns | | |
| Rubiaceae | |
Pachystigma macrophylla
| Farr | Contr. Bot. Lab. Morris Arbor. Univ. Pennsylvania 2(3): 423 | 1904 |
| Rubiaceae | |
Pachystigma micropyren
| Verdc. | Kew Bull. 42: 139 | 1987 |
| Rubiaceae | |
Pachystigma obovata
| (N.E. Br.) Eyles | Trans. Roy. Soc. South Africa 5: 494 | 1916 |
| Rubiaceae | |
Pachystigma pygmaeum
| (Schltr.) Robyns | Bull. Jard. Bot. État Bruxelles 11: 122 | 1928 |
| Rubiaceae | |
Pachystigma rhodesianum
| (S. Moore) Robyns | Bull. Jard. Bot. État Bruxelles 11: 119 | 1928 |
| Rubiaceae | |
Pachystigma schumannianum
| (Robyns) Bridson & Verdc. | Fl. Trop. E. Africa Rubiaceae 3: 768 | 1991 |
| Rubiaceae | |
Pachystigma solitariiflorum
| Verdc. | Kew Bull. 36: 541 | 1981 |
| Rubiaceae | |
Pachystigma stenophylla
| (Hiern) Eyles | Trans. Roy. Soc. South Africa 5: 494 | 1916 |
| Rubiaceae | |
Pachystigma tetraquetra
| (K. Krause) Eyles | Trans. Roy. Soc. South Africa 5: 494 | 1916 |
| Rubiaceae | |
Pachystigma thamnus
| Robyns | | |
| Rubiaceae | |
Pachystigma triflorum
| Robyns | S. African Pollen Grains & Spores iii 184 (1937). | 1937 |
| Rubiaceae | |
Pachystigma triphyllum
| (Baker) K. Schum. | Pflanzenw. Ost-Afrikas C: 387 | 1895 |
| Rubiaceae | |
Pachystigma venosum
| Hochst. | Flora xxv: 235 | 1842 |
| Rubiaceae | |
Pachystigma zeyheri
| Sond. | Linnaea 23: 56 | 1850 |