to the Rocky Mountains. 21? 



ERICINE^. 



248. Arbutus Uva unsi, L. Pursh fl.'i. p. 283. Mich, 

 jl. i. p. 249. On the Rocky Mountains. 



SAPOTEvE. 



249. Bumelia oblongifolia, Nutt. gen. ii. p. 135. On 

 the Missouri. Dr. Baldwin. 



Obs. A tree 15-20 feet high, and about four inches in di- 

 ameter. Bark rough. Thorns short, strong. The leaves 

 in my specimens are oblong-obovate, very obtuse, narrowed 

 at the base, pubescent beneath. They almost exactly agree 

 with a specimen of B. oblongifolia received from Mr. Nuttall, 

 though in his description the leaves are said to be smooth. 



EBENACEjE. 



250. Diospyros virginiana, L. Pursh Jl. i. p. 265. On 

 the Canadian, near its junction with the Arkansa. 



apocyne^:. 



251. Asclepias obtusifolia, Michx.Jl. i. 115. Barren 

 sandy soils along the Platte. Dr. James. On the Missouri. 

 Dr. Baldwin. 



252. A. obtusifolia, fi? latifolia, foliis lato-obovatis 

 obtusis, brevissime mucronatis, basi cordatis, utrinque glabris, 

 margine planis ; umbellis subsessilibus, axillaribus ; coronae 

 foliolis cucullatis, antheridiis subajqualibus, bidentatis ; cor- 

 nibus exsertis. 



Desc. Stem smooth. Leaves about four inches long and three inches 

 broad, rounded or emarginate at the extremity, subsessile, slightly mucro- 

 natc; texture firm. Umbels on peduncles scarcely one-fourth of an inch long; 

 pedicels smooth. Flowers middle sized, rather smaller than in the ordi- 

 nary variety of A. obtusifolia. Calyx smooth; segments lanceolate, acute 



