PL ANT. E WRIGHTIANiE 



TEXAN0-NE0-MEXICANJ5. 



Part II. 



The object of this memoir is to give a scientific account of the botanical collec- 

 tions made by Mr. Charles Wright, in New Mexico, or on the route thither from 

 Eastern Texas, during the summer and autumn of 1851, and the spring and early 

 part of the summer of the present year, 185 '2. In the former memoir, the publica- 

 tion of Mr. Wright's large collection made in 18-19 was carried as far as to the end 

 of the Order Compositce. On the present occasion I propose to give a similar ac- 

 count of these more recent collections, up to the same point, and hereafter, as soon 

 as other engagements will permit, to combine the account of the remaining portions 

 of these several collections, along with those of Mr. Fendler and j\Ir. Lindheimer 

 (the publication of which has likewise been arrested at the same point), into one 

 general memoir. 



Mr. W'right's collection in the year 1851 was made under the auspices of Colonel 

 Graham, of the Topographical Engineers, while attached to the scientific corps of 

 the U. S. Boundary Commission, then under Colonel Graham's charge. It is intended 

 more particularly to illustrate the new genera and species it comprises in an appen- 

 dix to Colonel Graham's Report, called for by the United States Senate : and a phy- 

 tographical account of the regions traversed, and of the stations which particular 

 plants occupy or afl'ect, drawn up by Mr. Wright, at my request, will give the gen- 

 eral features of the vegetation of the whole region. For the present I need only 

 state, generally, where the collections were made. The first portion was gathered 

 during the journey from San Antonio, Texas, to El Paso, in May and June, 1851, 

 and therefore on groimd that ]\Ir. AYright had more leisurely traversed, two years 

 previously, at a later season. This was forwarded to me in time for the incorporation 

 of a part of its novelties in my former memoir (q. v. p. 17). The later portion was 

 made from July to November, during a journey from El Paso to the copper mines 

 of Santa Rita del Cob re, in the southwestern part of New Mexico, and thence into 



PL. WR. 2. 



