292 MR. SPENCER LE M. MOORE—PHANEROGAMIC BOTANY 
weather which could scarcely have been exceptional, as I was informed by an intelligent 
old inhabitant, who expressed no surprise at the absence of rain, that Corumbá is a “ dry 
place.” 
The flora of this southern part of Matto Grosso is made up of the following factors :— 
IIA Topical American ..... ook ves eene 42 per cent. 
E a A wi eV a EAR weeks on i O 
Common to the two Brazilian provinces .......... I0 S 
North-Brazil-Guiana ............. POSU ua eee D^ E 
The relatively large number of diffused species will be noticed, as also the great decrease 
in the proportion of types common to the two provinces. The South-Brazilian contingent 
appears in great force, and the North-Brazil-Guiana is correspondingly diminished. The 
South-Brazilian factor is composed as under :— 
E a ora do a ee ae wa ees 54 per cent, 
Paraguay (extending into Argentina) ............ AT dg 5 
Bras. Or., Paraguay, Uruguay .................. IS uo 
And the common element thus :— 
N.-Brazil-Guiana and Bras. Or. ................ 63 per cent. 
N.-Brazil-Guiana, Bras. Or., and Paraguay ...... AD oe 
N.-Brazil-Guiana, Paraguay, and Argentina ...... I0 no 
Amazonian species, or species with Amazonian affinity, met with in the district under 
notice are :— 
Corynostylis pubescens, S. Moore. (This genus is not found in East Brazil, neither did I come across 
it further to the north.) 
Centrosema vexillatum, Benth. (A North-Brazil-Guiana plant.) 
Teramnus volubilis, Sw. (Amazonia, Colombia, Central America, West Indies.) 
Tephrosia brevipes, Benth. (Guiana, Colombia, Porto Rico.) 
Pterocarpus Rohrii, (N.-Brazil-Guiana.) 
Pacourina edulis, Aubl. (N.-Brazil-Guiana, Colombia, recently found in Paraguay.) 
Macfadyenia laurifolia, Miers. ( Venezuela.) 
The Argentine and Paraguayan element is illustrated by such types as :— 
Stigmaphyllon calcaratum, N. E. Br. | Thevetia bicornuta, Muell. Arg. 
Thinouia sepium, S. Moore, | Tabebuia Avellanede, Lorentz. 
Paullinia angusta, N. E. Br. | Coccoloba sarmentosa, S. Moore. 
Zizyphus oblongifolius, S. Moore. | Ficus Elliottiana, S. Moore. 
Pereskia Bleo, DC. | Tillandsia streptocarpa, Baker. 
Adaptations to xerophilous conditions in the form of swollen rootstocks, leathery leaves, 
and stems invested in a thick clothing of cork are frequently met with in this region. 
Several of the genera, such as Cercus, Pereskia, and Talinum, have fleshy leaves or 
stems. Another interesting xerophilous plant is the new Zizyphus oblongifolius; this 
has the narrow leaves characteristic of species endemic in warm or temperate climates, 
and in habit is quite different from tropical species with their reduced spines and large 
leaves; in fact, the plant is closely allied to one from the dry Argentine country. 
