EEPORT ON THE BOTANY OF THE ATLANTIC ISLANDS. 



Gl 



Name. 



10. Oommidendrtm 



11. Melanodendron 



12. Psiadia . ■ 



13. PetroUum . . 



1 4. Senecio . 



A trinities, of the Species, &e. 



15. Tripteris . . 



16. Lobelia. . . 



17. Wahlenbergia 



18. Plantago . . 



19. Heliotropium . 



20. Mellissia . . 



21. Acalypha . . 



22. Fimbrisbylis . 



23. Carex . . . 



24. Agrostis . ■ 



25. Eragrostis . . 



26. Demazeria . . 



Asteroid, near the American genera 

 Chiliotrichium and Diplostephiwm 

 and the Australasian Olearia. 

 As the last. 



A very distinct species. 

 Next to the Chilian Podanihus. 

 Two very distinct species, regarded by 

 some botanists as constituting two 

 independent genera. 

 Allied to South African species. 

 A distinct species. 

 Allied to African and Juan Fernandez 



species. 

 A very marked species. 

 Habit and foliage of a Tnurnefortia, 

 with floral structure of Heliotropium. 

 Shrubby, but otherwise nearly related 



to the American genus Saracha. 

 Allied to Mascarene species. 



Distribution of the Genera. 



Bermudan 



No special affinities. 

 With Mascarene and 



species. 

 No marked characteristic. 

 A very marked species. 



Closely allied to the South African 

 Demazeria acutiflorn. 



Endemic. 



Endemic. 



East Africa and Mascarene Islands. 

 Endemic. . 



Generally spread, including South Africa. 



Africa, almost wholly southern. 

 Widely dispersed, South Africa inclusive. 

 Widely dispersed, with the greatest 



concentration of species in Africa. 

 Generally spread, including South Africa. 

 General in warm countries, including 



South Africa. 

 Endemic. 



General in warm countries, including 



South Africa. 

 Widely spread, including South Africa. 

 Widely spread, including South Africa. 



Widely spread, including South Africa. 

 Widely spread in warm countries, in- 

 cluding South Africa. 

 Mediterranean region and South Africa. 



Out of twenty-six genera, twenty are represented in South Africa, but sixteen of 

 these have also a wider, and mostly a very wide, area of dtstnbution ; two are East 

 S a Indtlasearene ; and of the four endemic genera three have their greatest amrnty 

 among South American types, and the other one is nearest to the African Phyh^. 



The fact that recent explorations in Eastern Tropical Africa have brought to hgh 

 several additional species of Psiadia, and the presence of many arboreous (taf«*> 

 Sou* America and Australia, as well as in South Africa and India, go to prove att 

 ,vne is not essentially an insular one, though insular conditions seem favourable to it 

 devel LeutaTd survival. Arboreous feyrt. are a prominent feature in the present 

 flea ""In Fernandez, the Sandwich Islands, Canaries, to, ; but in each case they 

 "e lono to d lent tribes. Another point for consideration is the means by which the 

 C ;ol were conveyed to the island. Their light pappose achenes are a mnab 

 A La for whle disuersal, vet less so to such enormous distances than the seeds ana 



not pursue this inquiry farther in this place. 



