47 



82. Aster multiflorus Ait. Valley of the Musselshell, Au- 

 gust 19th. 



83. Aster lsevis Linn. Near Pompey's Pillar, August 14th. 



84. Aster tenuifolius Linn. Near Pompey's Pillar, August 

 14th. 



85. Aster faleatus Lindl. Valley of the Musselshell, August 

 24th. 



86. Maeserantha tanacetifoiia Nees. Valley of the Yellow- 

 stone, twenty-seven miles above Tongue River, August 6th. 



87. Macserantha eanescens Gray. Valley of the Yellow- 

 stone, near the mouth of Tongue River, August 6th. 



88. Erigeron pumilum Nutt. Fort Rice, June 13th. 



89. Erigeron Canadense Linn. Valley of the Musselshell, 

 August 21st. 



90. SolidagO rigida Linn. Valley of Musselshell, August 21st. 



91. SolidagO nemoralis Ait. Bottom-lands of the Mussel- 

 shell River, August 21 st- 



92. SolidagO gigantea Ait. Bottom-lands of the Musselshell 

 River, August 21st. Abundant. 



93. Lynosyris graveolens T. and G. Y r alley of the Mus- 

 selshell, August 21st. An abundant species over a wide area. 



94. Lynosyris graveolens T. and G., var. Near Shell Point, 

 Yellowstone River, July 27th. 



95. Lynosyris viseidiflora Hook. Musselshell River, Au- 

 gust 21st. 



96. Grindelia squarrosa Duval. Valley of the Yellowstone, 

 August 1st. 



97. Aplopappus Nuttalli D. C. Head of Heart River, July 

 8th. 



98. Aplopappns spinulosus D. C. Beaver Creek, July 13th. 



99. Chrysopsis villosa Nutt. Yellowstone, near mouth of 

 Custer's Creek, August 1st. 



100. Iva axillaris Pursh. Crossing of Big Muddy, June 30th. 



101. Iva ciliata Wild. Yellowstone, near mouth of Big Horn 

 River, August 11. 



102. Xanthium strumarium Linn. Yellowstone, near the 

 mouth of the Little Porcupine Creek, August 7th. 



103. Echinacea angustifolia D. C. Abundant on the prai- 

 ries between the Missouri and Yellowstone. 



104. Lepachys columnaris Raf. Bad Route Creek, July 

 28th. 



