DR. M. T. MASTERS ON THE PASSIFLORACE E. 641 
American genera are few, but they comprise by far the larger number of the species. 
The Asiatie and Australasian species are not numerous, and their distribution is tropical 
or subtropical. 
The American species of Passiflora may roughly be distributed in the following manner, 
according to the regions they inhabit. 
United States. Two species are found in this region. One, P. lutea, is found in Penn- 
sylvania and southwards (Gray); it belongs to the Decaloba section. The other, P. 
mearnata, is nearly allied to the Brazilian P. edulis, which belongs to the subgenus 
Granadilla, and, being so far separate from the remainder of its allies of the same sub- 
genus, may be considered an outlier. 
Texas and New Mexico have a few distinct-looking species belonging to the sections 
Cieca and Decaloba. 
Mexico has several distinct and peculiar species belonging to the subgenera Cieca and 
Decaloba. 
Central America, from about lat. 15^ N. to lat. 8°, has a few species, mostly of Mexican 
type, and also a few Granadillas. P. quadrangularis, indeed, is found wild in the woods 
of Nicaragua. 
The West Indies have about thirty species, eleven of which are peculiar to the islands. 
The species of the section Murucuia are confined to this district. There are eight species 
- belonging to the section Decaloba, and as many to Granadilla; but none of the latter are 
peculiar. On the whole the West-Indian region, so far as Passion-flowers are concerned, 
is one of the most distinctly marked. EN 
The Galapagos Islands contain two or three distinct varieties, which, indeed, were 
considered to be species by Dr. Hooker. "They pass by so many shades into continental 
varieties of the protean P. suberosa, that, although noteworthy as local or insular forms, 
I cannot hold them to be specifically distinct. 
Venezuela and N.E. New Granada contain several species belonging to the sections 
Decaloba and Granadilla, 
Guiana and the Amazon district. So far as plants of this order are concerned, the 
regions above named may be taken together. Rich in species, many of them peculiar, 
this district is one of the most remarkable of the whole. Dilkea is peculiar to it, 
as also are two of the species of Passiflora belonging to the subgenus Astrophea, several 
Granadillas, and some Decalobas. Ciecas are scarce. True Tacsonias, in my sense of 
the word, are absent. 
Western Andes, including, in general terms, the western districts of New Granada, 
Ecuador, Peru, Bolivia, and Chile. This region is the home of the Tacsonias, many of 
which grow at great heights on the mountains, No Tacsonias proper are found beyond 
this district. T. pinnatistipula occurs furthest to the south in Chile. 
In the lower equatorial regions a few species of Granadilla and Decaloba are found, 
and a few Ciecas. 
North-east Brazil is not rich in species; the majority are species of Granadilla. 
Central Brazil, including the east-coast regions, has a large number of species of 
Granadilla, but few peculiar species, 
VOL. XXVII. 4 Q 
