44 



36. Astragalus Nuttallianus D. C. Near Heart River, 

 July 7th. 



37. Astragalus raceniOSUS Pursh. Heart River Crossing, 

 June 26th. 



38. Astragalus Plattensis Nutt. Fort Rice, June 13th. 



39. Astragalus adsurgens Pall. Heart River Crossing, 

 June 26th. 



40. Astragalus aboriginum Rich. Heart River Crossing, 

 June 26th. 



41. Astragalus bisuleatus Gray. Head of Heart River, 

 July 8th. 



42. Oxytropis Lamberti Pursh. Fort Rice, June 1 3th. 



43. Glycyrrhiza lepidota Nutt. Mouth of Little Porcupine 

 Creek, August 4th. 



44. Amorpha fruticosa Linn. Heart River Crossing, June 

 26th. A rather common shrub along the streams. 



45. [Amorpha canescens Nutt.] Common on the prairies. 



46. Amorpha microphylla Pursh. Heart River Crossing, 

 June 26th. Common only at a few localities. 



ROSACEA. 



47. Prunus Virginiana Linn. Fort Rice, June 15th. A 

 common shrub alon<j all the streams, from the Missouri to the Mussel' 

 shell, and on the tributaries of the Little Missouri and Heart Rivers, 

 but not frequent on the Yellowstone, between .Glendive Creek and 

 Pompey's Pillar. 



48. Prunus pumila Linn. Near the Great Bend of Heart 

 River, June 24th. 



49. Potentilla arguta Pursh. Crossing of the Big Muddy, 

 June 30th. 



50. Potentilla Pennsylvanica Linn., var. Head of Heart 

 River, July 8th. 



51. Potentilla anserina Linn. Bad Route Creek, near the 

 Yellowstone, July 28th. 



52. Potentilla gracilis Dough, var. Head of Heart River, 

 July 8th. 



53. Potentilla fruticosa Linn. Heart River Crossing, June 

 25th. 



54. Rosa blanda Ait. Prairies west of Fort Rice, June 22d. 

 Abundant on the prairies almost everywhere, thence westward to the 



