CHAP. XIX.] 
THE MADAGASCAR GROUP. 
413 
Rodriguez and one in Polynesia. Mespilodaphne, an extensive 
genus of Lauracese, has six species in the Mascarene islands, 
and all the rest (about fifty species) in South America. Ne- 
penthes, the well-known pitcher plants, are found chiefly in the 
Malay Islands, South China, and Ceylon, with species in the 
Seychelles Islands, and in Madagascar. Milla, a large genus of 
Liliacese, is exclusively American, except one species found in 
Mauritius and Bourbon. Agauria, a genus of Ericaceae, is con- 
fined to the Mascarene islands and the Camaroon Mountains 
in West Africa. An acacia, found in Mauritius and Bourbon 
(A. heterophylla), can hardly be separated specifically from 
Acacia koa of the Sandwich Islands. The genus Pandanus, 
or screw-pine, has sixteen species in the three islands — 
Mauritius, Rodriguez, and the Seychelles — all being peculiar, 
and none ranging beyond a single island. Of palms there are 
fifteen species belonging to ten genera, and all these genera are 
peculiar to the islands. We have here ample evidence that 
plants exhibit the same anomalies of distribution in these 
islands as do the animals, though in a smaller proportion ; while 
they also exhibit some of the transitional stages by which these 
anomalies have, in all probability, been brought about, render- 
ing quite unnecessary any other changes in the distribution of 
sea and land than physical and geological evidence warrants . 1 
1 It may be interesting to botanists and to students of geographical 
distribution to give here an enumeration of the endemic genera of the 
Flora of the Mauritius and the Seychelles, as they are nowhere separately 
tabulated in that work. 
Aphloia (Bixaceae) 1 sp., a shrub, Maur., Rod., Sey., also 
Madagascar. 
Medusagyne (Ternstromiace8e)..l sp., a slmib, Seychelles. 
Astiria (Sterculiacese) ... 1 sp., a shrub, Mauritius. 
Quivisia (Meliacese) 3 sp., shrubs, Mauritius (2 sp.), Rodriguez 
(1 sp.), also Bourbon. 
Cossignya (Sapindaceae) 1 sp., a shrub, Mauritius, also Bourbon. 
Hornea „ 1 sp., a shrub, Mauritius. 
Stadtmannia „ 1 sp., a shrub, Mauritius. 
Doratoxylon „ 1 sp., a shrub, Mauritius and Bourbon. 
Gagnebina (Leguminosse) 1 sp., a shrub, Mauritius, also Madagascar. 
Roussea (Saxifragaceae) 1 sp., a climbing shrub, Mauritius and 
Bourbon. 
