. PREFACE. Vil 
Genera. 
-Convolvulus 62. Psychotria 54. Solanum 90. Alchemilla 
5. Lobelia 30. Verbena 26. Laurus 38. Buddleja 10. 
Tournefortia 12. Mimosa 121. Salvia 66. Croton 61. Quer- 
cus 19. Urtica 29. Ficus 30. Passiflora and Tacsonia 31. 
Cleome 11. Bignonia 32. Gentiana 20. Asclepias 22.. Cy- 
nanchum 27. Melastoma 41. Myrtus 29. Myristica 6. 
Euphorbia 22. Theophrasta 5. Barnadesia 4. Gnaphalium 19. 
Aster 54, -Eupatorium 79. Senecio 41. Helianthus 30. Ste- 
via 27. Cacalia37. Werneria 20. Tagetes 15. Verbesina 25. 
Bidens 20.. Melampodium 12. Culcitium 5. she il. 
Acalypha’ 24. Clnsia 21. Aralia et Actinophyllum 15.* - 
This collection also contains numerous specimens, both in 
flower and fruit, of all the species of the highly interesting genus 
Cinchona, collected by the above- ed celebrated bota- 
nists and their oy oe OE part of a col- 
lection Which was taken in a Spanish prize bound from Lima 
to Cadiz; part of whose cargo was sold in London, among 
which was a fine collection of Cinchone, purchased by Mr. 
Thompson, of Sloane ors ‘who had the kindness to give hritn 
* The author daily expects fran his friend M. Pavon, Specinféus of the plant called eke 
about which so much has been said in our newspapers and periodical works, It is his inten- 
tion to give a description and figure as soou as they arrive. The letter of M. Pavon relating to 
this plant is as fullows:—** The Aracacha I conceive to be a species of Daucus ; its root I 
have frequently eaten, the tuste resembles that of parsnip. The plant is cnitivated by the 
Indians, who make much use of it. ‘There exists in Pera a small quadsuped which the Indians 
call Missu, and which is very fond of the root of the Aracacha. They sometimes destroy in 
one night a whole field that is planted with it. 1 once possessed one of these animals, which 1 
domesticated from having it young. ‘I decided that it belonged to the genus Mus, and the spe-_ 
cies called Mus aguti by Linnieas, and described tbe M. ibeesongesh de Bomare in his et 
of Natural History.” 
