193 Plants collected during a journey 



Corymb compound, terminal, loose, about 30-flowered. Flowers small. 

 Calyx 5-sepalIed, 5-bracteate, silky ; sepals triangular-lanceolate, acute, 

 entire; bracts as long as the sepals, but narrower. Petals small, obcor- 

 date, yellow. Pericarps ovate, smooth, fixed to a dry hairy receptacle. 

 Perennial. 



Hab. Sources of the Platte. 



Obs. This species appears to be allied to P. candicans 

 of Humboldt and Bonpland. Its leaves are nearly as white 

 beneath as those of P. Anserina. 



131. Rosa rubifolia, R.Brown in Ait. keio. ed. 2. iii. 

 p. 2G0. JYutt.gen. i. p. 308. DC. prod. ii. p. 59S. On 

 the Missouri. Dr. Baldwin. 



Obs. This beautiful rose is accurately described by R. 

 Brown (I. c). The flowers in all my specimens are corym- 

 bose, at the extremity of the branches, as described in the 

 variety /3. macrophylla of Seringe. Sometimes twenty or 

 more occur in a single corymb. Pursh marks this species as 

 doubtful, though it is stated by Mr. Nuttall to inhabit all the 

 Western States, to Louisiana. 



132. Cercocakpus fotiiergilloides, Humb. Bonpl. 

 and Kunth, nov. gen. amer. vi. p. 233. t. 559. (ex Kunth Syn. 

 pi. cequinoc. iii. p. 474.) DC. prod. ii. p. 589. 



Desc. Shrub much branched ; the branches terete, of a dark brown 

 color, the bark on the smaller ones corrugated. .Leaves alternate, round- 

 ish-ovate, about three-fourths of an inch in length, subplicate; margin un- 

 equally and sometimes doubly serrate; under surface villous-pubescent, 

 strongly nerved ; base rather acute ; petioles about a line long, with short 

 subulate stipules at the base. Flowers fasciculate ? growing from t!«e ex- 

 tremity of the branches. Calyx turbinate-cylindrical, colored, persistent, 

 except the border, which is deciduous. Petals 6. Stamens — . Capsule 

 cylindrical, enclosed in the persistent calyx, sericeo-villous, l-cellcd, 1- 

 seeded, not opening, caudate with the persistent style, which is more than 

 an inch in length. Seed cylindrical. 



Hab. On the Rocky Mountains. Near the city of Mexico. 

 Humb. and Bonpl. 



