3SS APPENDIX. 



markable glandulosity of the petioles and serratures of tlie 

 leaves, seems to indicate a separate species. I describe 

 it thus : 



Branches flexuosely bent, spreading, with very long, 

 straight, rectangularly divaricate spines, of a shining 

 brown colour from the axills of the leaves ; nearly as long 

 as the leaf and petiole. Leaves ovate, broad, acutely, but 

 not deeply lobed ; lobes crenately serrate, with a conspicu- 

 ous glandule on each serrature, on petioles half as long as 

 the leaf, which are densely beset with numerous glandules 

 all their length. Upper surface of the leaves smooth and 

 shining; lower nearly smooth, or only sparse hair on the 

 nerves. 



Hah. near Rainy Lake. 



47. SoRBUs Americana.) Pursh. p. 341. 

 Common on northern mountains. 

 Hah. Falls of St. Anthony. 



48. Spiraea opiilifolia, Pursh, p. 342. 

 Common through the United States. 



49. Spiraea hypericifolia, Pursh, p. 341. 

 Not so common as the former. 



50. Rosa *Sayi, L. v. Schw. 



This appears to me to be a Rose quite distinct from any 

 American one, although it is past flowering; the germen 

 being manifestly not globose, (which is the case with all 

 the rest except laevigata,) nor do I find any European 

 one sufficiently agreeing. I describe it thus : 



Germen oblong ovate, perfectly smooth, and propor- 

 tionably large, crowned by erect calyx leaves, exceeding 

 it in length, which are villous, and expand at summit. Pe- 

 duncle smooth, or somewhat glandularly hispid, rigid. 

 Common petiole villous and aculeate on the back, with 

 three pairs of ovate, sessile, deeply serrate, small leaflets, 



