| Rubiaceae | |
Hymenocoleus axillaris
| Robbr. | Bull. Jard. Bot. Natl. Belg. 47: 17–19 | 1977 |
| Rubiaceae | |
Hymenocoleus barbatus
| Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 286, f. 3B | 1975 |
| Rubiaceae | |
Hymenocoleus glaber
| Robbr. | Bull. Jard. Bot. Natl. Belg. 47: 14–15 | 1977 |
| Rubiaceae | |
Hymenocoleus globulifer
| Robbr. | Bull. Jard. Bot. Natl. Belg. 47: 24–26, f. 6 | 1977 |
| Rubiaceae | |
Hymenocoleus hirsutus
| (Benth.) Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 288 | 1975 |
| Rubiaceae | |
Hymenocoleus libericus
| (Hutch. & Dalziel) Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 291, f. 2C–F, 3F | 1975 |
| Rubiaceae | |
Hymenocoleus multinervis
| Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 294295, f., 3I | 1975 |
| Rubiaceae | |
Hymenocoleus nervopilosus
| Robbr. | Bull. Jard. Bot. Natl. Belg. 47: 10–12, f. 4 | 1977 |
| Rubiaceae | |
Hymenocoleus neurodictyon
| (K. Schum.) Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 291–292, f. 2B, 3G | 1975 |
| Rubiaceae | |
Hymenocoleus petitianus
| Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 286–287, f. 3C | 1975 |
| Rubiaceae | |
Hymenocoleus rotundifolius
| (A. Chev. ex Hepper) Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 287 | 1975 |
| Rubiaceae | |
Hymenocoleus scaphus
| (K. Schum.) Robbr. | Bull. Jard. Bot. Natl. Belg. 47: 22, 24 | 1977 |
| Rubiaceae | |
Hymenocoleus subipecacuanha
| (K. Schum.) Robbr. | Bull. Jard. Bot. Natl. Belg. 47: 20–21 | 1977 |
| Rubiaceae | |
Hymenocoleus thollonii
| (De Wild.) Robbr. | Bull. Jard. Bot. Natl. Belg. 45: 283–285, f. 4 | 1975 |