284 MR. SPENCER LE M. MOORE—PHANEROGAMIC BOTANY 
in Guiana, a country united by Grisebach with Venezuela and parts of Colombia 
and Central America to form his Cis-Equatorial region. In this way Engler defines 
a North-Brazil-Guiana province. Besides the rest of Brazil, his Sowth-Brazilian 
province comprises Uruguay, Paraguay, the Argentine provinces of Entre Rios and 
Corrientes, Eastern Bolivia, and the comparatively high-lying country immediately 
westward of the Chaco. This latter he considers doubtful land, possibly with a 
predominating Pampas flora. Engler's North-Brazil-Guiana province—taking in, it 
may also be said, the Venezuelan savannas—thus includes almost the whole of Goyaz, 
as well as the little-known northern part of Matto Grosso; the southern boundary of this 
province will be the watershed between the Xingu, Tapajos, and Guaporé rivers to 
the north and the Paraguay and its feeders to the south. From Drude's* Amazonas 
region the highlands of Guiana are excluded, but all the N.E. of Brazil, including the 
littoral almost to the 20th parallel, forms part of the region whose southern limit 
practically coincides with that of Engler’s North-Brazil-Guiana province. All the 
south of Brazil, with Uruguay, Argentina east of the Parana, the country behind 
the Chaco, and Eastern Bolivia together make up the Paraná region of Drude, which 
thus largely corresponds with Engler’s South-Brazilian province. 
There can, I think, be but little doubt that Engler’s views are founded upon reason. 
Bounded on the north-east by the uplands of Maranháo and Piauhy, which, to say 
nothing of the tract of country lying still further to the east, are scarcely to be 
considered as having much in common with the moist Amazon forest-zone—in the 
east and south-east separated from Minas Geraes and Southern Goyaz by several 
ranges of high hills, such as the Serras do Duro, da Tabatinga, and divisóes do Rio 
Claro,—orographical data are certainly on the side of the Berlin Professor. The weak 
point in his position consists in the fact that the watershed separating the Paraguay 
head-waters from those of the Xingu, Tapajos, and Guaporé is a remarkably low one; 
well, therefore, might the thoughtful student doubt whether that watershed really 
marks the boundary between the two great provinces, and, as will shortly be shown, 
the collections which I have just brought back prove such a doubt to be warranted. 
A few words will first be devoted to the flora of Cuyabá and the Chapada Plateau, 
after which we will consider the flora of Santa Cruz and, more interesting still, that of 
the forest-region situated to the north of that settlement. 
FLORA oF CUYABÁ AND THE CHAPADA PLATEAU. 
The city of Cuyabá lying fifteen and a half degrees south of the line, cursory inspec- 
tion will convince the reader that it is well within the limits of Engler’s South-Brazilian 
province as of Drude’s Paraná region. We should therefore expect its flora—especially 
the plateau portion thereof—to show much similarity to that of some of the eastern 
provinces, especially the upland country of Minas Geraes and Southern Goyaz. At the 
same time the provincial boundary is not very far off, the distance between Cuyabá and the 
sources of the Arinos being only about a hundred miles. Consequently no surprise should 
* * Die Florenreiche der Erde.’ Reprinted from Petermann’s * Mittheilungen, 1883-84, 
