Affinities: Mexico, Central America, West Indies. 327 
It is seen from this table that the closest relationship exists between the 
flora of Haiti and Jamaica, 333 species being common to both. If the flora 
of Cuba and Jamaica be compared directly, only ı9 species are peculiar to 
both, whereas 250 plants common to Jamaica and Haiti are also found in 
Cuba. Seventeen phanero- 
gams and gymnospermae 
are found in common in 
Mexico (Fig. 17) — Central 
America and Jamaica, while 
if those which are found in 
these countries, as well, as 
those which have extended 
their range to Haiti and 
Cuba, 178 species of indi- 
genous plants are common 
to all these places. The 
affınity of the Jamaican 
flora to that of the island 
of St. Croix is interesting, 
but not dependable because 
based on incomplete lists. 
(See under Bahamalslands.) 
Only one species is pecu- 
liar to both according to 
our table, yet, if the species 
common to St. Croix, Ja- 
maica, Cuba and Haiti are 
considered 63 plants are 
found in all. The plants 
which have extended them- 
selves in Jamaica, Mexico 
— Central America and 
Haiti number one hundred _ 5 Be. 
uk gen (Science re en se of the mountains of Mexico at 
x 3 53) after an elevation of 5—8,000 feet in the tropic rain forest, ealti- 
a study of the Jamaican yated for its cathartie roots. After Die Natürlichen Pflanzen- 
sedges holds that the South familien IV 3a, p- 28. 
the Jamaican flora is more intimate than that of Cuba, Haiti or Puerto Rico, 
However, the results given above can be tentative only until the recent collections 
of plants have been studied critically. It has been established that there is a 
Strong interrelationship of the flora of the different islands and with the main- 
land of Central and South America, while the flora of the hammocks of southern 
Florida and the flora of the Bahamas are strongly West Indian. 
