OF THE MATTO GROSSO EXPEDITION, 1891-92. 291 
The reader will also notice here the extremely small contingent of species common to 
the two Brazilian provinces ; so that while at Cuyabá no less than eighty-eight per cent., 
and even at Santa Cruz seventy-eight per cent., of the vegetation consists of species one 
might expect to find anywhere in Eastern Brazil, or of plants most nearly related to such 
species, this element of the forest flora amounts to no more than forty-six per cent., the 
proportion of species endemic in regions outside Eastern Brazil being at Cuyabá seventy- 
three, at Santa Cruz eighty-four, and in the forest eighty-eight per cent. 
Here is appended a short list of some forest plants with Amazonian distribution or 
Amazonian affinity ; the distribution or affinity is shown within brackets :— 
Guarea sylvestris, S. Moore. (Near the N.-Brazil-Guiana G. paraensis, C.DC.) 
Pithecolobium stipulare, Benth. | (N.-Brazil-Guiana.) 
Bertiera guianensis, Aubl. (N.-Brazil-Guiana, West Indies.) 
Psychotria triphylla, Muell. Arg.  (N.-Brazil-Guiana.) 
Psychotria homoplastica, S. Moore. (Near P. lupulina, Benth., from Amazonia.) 
Bletia catenulata, Ruiz & Pav. (Guiana, Peru.) 
Rodriguezia secunda, H. B. K. (N.-Brazil-Guiana, Central America, West Indies.) 
Anthurium gracile, Lindl. (N.-Brazil-Guiana, Central America, Trinidad.) 
Anthurium sylvestre, S. Moore. (Near A. Martini, Schott, from Guiana.) 
Hypolytrum longifolium, Nees. (N.-Brazil-Guiana, Trinidad.) 
My notes contain no record of ‘the finding in the forest of a single plant restricted to 
the South-Brazilian province, and there are only four with exclusive South-Brazilian 
affinity; these are the new species Herpestis parvula, Solanum saltiense, Dalechampia 
sylvestris, and Ischnosiphon nemorosus. 
The smallness of the collection gives one but slight opportunity to study the ordinal 
peculiarities of this flora. It may, however, be stated that the Rubiacew, Orchids, and 
Aroids show decided affinity with those of the North-Brazil-Guiana province. Moreover, 
one meets with Zamia Brongniartii, Wedd., on the Tapirapuan campos. The foregoing 
facts, it is submitted, force upon one the conclusion that, unless the evidence yielded by 
my collection be deceptive, the forest-region, although lying well within the Paraguay 
Valley, must be included within the bounds of the North-Brazil—Guiana, and not, as 
would naturally be supposed, within those of the South- Brazilian province. 
FLORA OF CORUMBÁ AND COIMBRA. 
Corumbá is situated close to the ninteenth parallel of south latitude, and Coimbra still 
further south. The extreme northern end of the Gran Chaco being not far off, one 
might expect to find, in the flora now to be considered, indications of the proximity of a 
region of comparative drought; and this, as will soon appear, is to some extent the case. 
The climate of Corumbá is much like that of Cuyabá, but I do not know what is 
its annual rainfall. To judge from our own experience, we having spent six weeks 
here in the middle of the wet season, the rainfall is probably less than at Cuyabá. 
Throughout those weeks I do not remember a single day during at least some part of 
which botanizing was impracticable; and although the district was occasionally visited 
by violent storms, bright sunshine followed by a brilliant sunset was the general rule— 
2Q 2 
