286 MR, .SPENCER LE M. MOORE—PHANEROGAMIC BOTANY 
common to the two provinces into which the Berlin Professor divides Brazil. Making 
the requisite modifications in the foregoing statement, the flora of Cuyaba and the 
Chapada Plateau may be said to be made up of the following factors :— 
Bee, Tropical American [euer ceses senses 35 per cent. 
Common to the two Brazilian provinces ............ S uU a 
HON MANERA CIE EE E xs EN s 
Nori Braai- Gumna n. e te roy aur emer haa DO o 
Of this last factor it may be added that— 
Types restricted to Amazonia constitute ............ 40 per cent. 
[rne restricted to Goyaz B Fco OI ee aD uo 
Types of wider distribution eco xix e iia Mis 
We have already seen the rainfall of Cuyabá to be, for a tropical country, but scanty ; 
moreover, the dry season, while it is of long duration, is very seldom interrupted by 
storms. The vegetation of the open country, as distinguished from that of the moister 
valleys, should therefore show some adaptation to xerophilous conditions. The swollen 
rootstocks, characteristic of many Matto Grosso herbs and small shrubs, are undoubtedly 
in point here; an examination of the underground parts of trees and the larger shrubs 
would probably show this adaptation to be yery common. Coriaceous leaves also are the 
rule; and the trunks of trees are often thickly covered with cork, apparently functioning 
as a hindrance to transpiration. The same end is often served by great diminution 
in the number of leaves, so that it is by no means unusual to see shrubs perfectly leafless 
except immediately beneath the inflorescence. The assumption by leaves of a position of 
least insolation is rarely observed : Xylopia grandiflora, A. St.-Hil., which has them verti- 
cally pendent, and Myrcia ambigua, DC., are the best cases noted by me. Spiny plants 
do not occur in any great quantity. 
Among noteworthy North-Brazil-Guiana species, or species having their nearest aflinity 
with such, may be cited Banisteria constricta, Griseb., Bauhinia cumanensis, H. B. K., 
Inga nobilis, Willd., and the new species Guatteria sylvicola, Glianthus collinus, Laden- 
bergia chapadensis, and Ajouea pruinosa, Among genera abundantly represented in 
Eastern Brazil, but here dying down, none is more noteworthy than the Labiate Hyptis. 
Of this genus no less than a hundred and sixteen species are peculiar to the South- 
Brazilian province, while those endemic in North-Brazil-Guiana number but five, and of 
the forty-five species common to both provinces only six reach Amazonia. Similar facts 
may be cited for the genus Begonia and others; they might well lead us to suspect, as is 
actually the case, that at Cuyabá we are near the limits of a botanical province. 
FLORA OF JANGADA. 
The flora of this place may be taken as representing that of the large district to the 
north of Cuyabá lying between the Cuyabá and the Paraguay rivers. The various factors 
of the flora, as shown in my collection, may be stated thus :— 
