48 



105. Helianthus pumilis Nutt. Divide between the Mussel- 

 shell and Yellowstone, west of Pompey's Pillar, August 18th. 



106. Helianthus lenticularis Dougl. Musselshell and Yel- 

 lowstone divide, August 18th. • 



107. Helianthus petiolaris Gray. Near Pompey's Pillar, 

 August 16th. 



108. Helianthus Maximiliani Sehrced. Valley of the Mus- 

 selshell, August 20th. 



109. Coreopsis tinetoria Nutt. Found only at one small 

 locality, a few acres in extent, on a moist prairie near Beaver Creek, 

 July 13 th. 



110. Dysodia chrysanthemoides Lag. Shell Point, Yel- 

 lowstone River, July 21st. 



111. Gallardia aristata Pursh. Near Fort Rice, June 20th. 



112. Hymenopappus tenuifolius Pursh. Second Crossing 

 of Heart River, July 6lh. 



113. Actinella acaulis Nutt. Near Heart River, June 26th. 



114. Actinella Richardsoni Nutt. Head of Heart River, 

 July 8 th. 



115. Achillea millefolium Linn. Crossing of the Big 

 Muddy, June 30th. Occurs sparingly from the Missouri to the Mus- 

 selshell. 



116. Artemisia dracuneuloides Pursh. Valley of the 

 Musselshell, August 21st. 



117. Artemisia Canadensis Michx. Custer's Creek, Sep- 

 tember 6th. Abundant in the valley of the Yellowstone and in the 

 bad lands. 



118. Artemisia Ludoviciana Nutt., var. Musselshell Val- 

 ley, August 21st. Abundant throughout the bad lands, and in the 

 valleys of the Musselshell and Yellowstone. 



119. Antennaria dioica Gaertun. Heart River, June 24th. 



120. Senecio lugens Rich., var. Fort Rice, June 13th. 



121. Senecio eanus Hook. Crossing of Big Muddy, July 1st. 



122. Senecio aureus Linn. Near Fort Rice, June 20th. 



123. Arnica angustifolia Vohl. Fort Rice, June 13th. 



124. Circium undulatum Spreng. Bad Route Creek, 

 July 28th. 



125. Circium Virginianum Michx., var. Valley of the 

 Musselshell, August 24th. 



126. Lygodesmia juncea Don. Shell Point, Yellowstone 

 River, July 2 2d. 



