[17] Torti's work, De Febribus, was published at Venice in 1732.
[18] Traité Thérapeutique du Quinquina, par P. Briquet. Paris, 1856.
[19] Voyage de Condamine, p. 31.
[20] 1738, p. 226.
[21] Noticias Secretas, p. 572.
[22] Semanario de la Nueva Granada, p. 283.
[23] Endlicher separated the species whose capsules begin to open from the top, and formed them into a sub-genus, which he called Cascarilla. Klotzsch, combining these with other species characterised by a six-parted corolla, raised them to an independent genus called Ladenbergia.
[24] Histoire naturelle des Quinquinas, p. 72.
[25] Dr. Weddell's list is as follows:—
| 1. | C. Calisaya | (Weddell) | Bolivia and Caravaya. |
| 2. | C. Condaminea | (Humboldt) | Loxa. |
| 3. | C. Scrobiculata | (Humboldt) | Peru. |
| 4. | C. Amygdalifolia | (Weddell) | Peru and Bolivia. |
| 5. | C. Nitida | (Ruiz and Pavon) | N. Peru. |
| 6. | C. Australis | (Weddell) | Southern Bolivia. |
| 7. | C. Boliviana | (Weddell) | Caravaya and Bolivia |
| 8. | C. Micrantha | (Ruiz and Pavon) | Peru and Bolivia. |
| 9. | C. Pubescens | (Vahl) | Peru and Bolivia. |
| 10. | C. Cordifolia | (Mutis) | New Granada. |
| 11. | C. Purpurascens | (Weddell) | Bolivia. |
| 12. | C. Ovata | (Ruiz and Pavon) | Peru and Bolivia. |
| 13. | C. Chomeliana | (Weddell) | Bolivia. |
| 14. | C. Glandulifera | (Ruiz and Pavon) | N. Peru. |
| 15. | C. Asperifolia | (Weddell) | Bolivia. |
| 16. | C. Humboldtiana | (Lambert) | Jaen. |
| 17. | C. Carabayensis | (Weddell) | Caravaya. |
| 18. | C. Mutisii | (Lambert) | Loxa. |
| 19. | C. Hirsuta | (Ruiz and Pavon) | N. Peru. |
| Doubtful. | |||
| C. Discolor | (Klotzsch) | N. Peru. | |
| C. Palalba | (Pavon) | Peru. |