14 UNITED STATES AND MEXICAN BOUNDARY. 



After 



profusion of bright colored 

 iria. EschschoUzia Doiialasii. 



A 



more alluvial portions of the tract are occupied by Obione canescens. In the deep cracks of the 



smooth washed surface Bowlesia tenera and 



Hosachia are found. Near the 



[- 



immediate valley of the Gila we encounter species of CEJaotliera^ Simsia^ GaiUardia^ and 



Grand 



Oligomeris glaitcescens . 



* 



The valley of the Gila has many feature^i in common with that of the Rio 

 among the botanical productions common to both valleys we notice Tessaria horealis and 

 inezc[uitej whicli latter forms dense "chaparral." The trees bordering the stream are mostly 

 cotton wood and willow. 



VEGETATION OF THE RIO GRANDE, CANONS, AKI. ^HE CONNECTED 



j-iK^A., 



The flora of the canons of the Eio Grande differs but little from that of th^ -niountain rri^T*'^*' 

 we have already alluded to. We find stunted shrubs rooted in the creviceis of the rock., '^r 

 scattered along the broken summits. The abrupt walls, whether of limestone or of igoeous 

 rock, afford favorable places for the growth of such plants as affect inaccessible localities. Here 

 we meet two species of the well characterized genus Laphamia^ viz : L. disseda and L. hisetosa; 

 also Ferityle aglossa and L. Parryi, the pretty Eucnide lohata, Coioania ericifolia^ and emoryi^ a 

 new genus of the order ScrophulariacecBy dedicated to Major Emory. 



In open places the vegetation peculiar to table lands makes its appearance. 



Norte 



more 





^alinopsis frutescens y NicolettiaEdwardsiiy and several 

 common, and the delicious fruited Cereus sframineui 



perfection. 



All the basins and canons within these limits present a similar vegetation to the one just 



noticed. 



Sal 



Scutellaria J was discovered. This 

 der LabiatcB. It has a straggling 



habitj and grows along the gravelly margins of dry water courses. The Sierra Carmel 



mon 



Y botanical novelties, was 

 Under these circumstances 



back ground of hmh mountains, form 



the traveller, wearied by the 



mo 



From 



the forms 



arid and thorn beset district. 



information could be obtained respecting its flora. Live oaks and the nut pine grew upon the 

 higher ridges, and its upland plains and valleys were covered with luxuriant grama grass. The 

 beautiful Santa Eosa valley is marked by the most attractive scenery. Its broad and fertile 

 plains, with copious streams, bordered by gigantic cypress, sycamore, and pecan trees, with a .^ 



■"^■^ 



