Tropie Zone: Guatemalan Region. 663 
sections on the one hand and the Mexican on the other. On account of its 
deserts, the Mexican tropic territories are easily separated from the Central 
American countries, which although showing in their flora close affınities to that 
of South Mexico, yet do not possess an alpine mountain flora, such as occurs 
in Mexico. Then too, the Central American vegetation includes many South 
American types, which do not reach southern Mexico '). 
Fig. 32. Erythea (Brahea) edulis S. Wats. growing at an altitude of 1,000 feet (300 m) near Rascon, \ S ir 
Stat \ 
e of San Luis Potosi, Mexico. 
3. Guatemalan Region. 
This region comprises the political states of Chiapas (Mexico), British 
Honduras, Guatemala, Honduras, Salvador and northern ee: 
and, with a diversified topography, situated in the tropics’has a a 
rich flora arranged into a number of well characterized plant formatıons. “2 
land plains exist, elevated tablelands occur and several high mountain peaks, 
described in Chapter I, page 117. — 
he Mangrove Formation (Rhisophora mangle and 
Occupies a narrow strip along the Atlantic and Pacific coa 
associated species) 
sts of this region, 
a late XXVI. 
1) Cfr. map by Carwert, P. P.: Proc, Acad. Nat. Sci. of Phila. 1908: 460498, PAS 
