APPENDIX D. BOTANY. 391 



from one root. Leaves somewhat fleshy, densely clothed with a 

 white tomentum ; the lobes very small, obtuse, and much crowded. 

 Heads few (3-6) in a terminal corymb. Flowers of the ray and 

 disk nearly alike, funnel-form. Pappus of about ten oblong, 

 obtuse, denticulate scales; five of which, in the disk flowers, are 

 nearly as long as the tube of the corolla, and the five other about 

 half as long. Scales in the ray flowers much shorter than the 

 corolla tube. 



Plate VII. Chenactis achilleccfolia, of the natural size. Fig. 1, 

 a head of flowers. Fig. 2, an exterior scale of the involucrum. 

 Fig. 3, an interior scale of the same. Fig. 4, a disk flower. 

 Fig. 5, cross section of an achenium. Fig. 6, a ray flower. Fig. 

 7, branches of the style and appendages.- Fig. 8 and 9, scales of 

 the pappus from a disk flower. 



Layia Glandulosa, Hook, and Arm; Torr. and Gray, Fl. 2, 

 p. 394. — Valley of the Salt Lake, east side. 



Achillea Millefolium, Linn. — Islands of the Salt Lake, June. 



Artemisia tridentata, Nutt. in Trans. Amer. Phil. Soc. 



(n. ser.) 1, p. 398. — Green River, Sept. 12. Many of the larger 



species of the genus are called "Sage" by the hunters and emi- 

 grants. 



A. frigida, Willd.; Torr. and Gray, FL 2, p. 424.— With the 

 preceding. 



A. Ludoviciana, Nutt., Gen. 2, p. 143. — With the preceding. 



A. Canadensis, Mich., Fl. 2, p. 129. — With the preceding. 



Senecio filifolius, Nutt. in Trans. Amer. Pbil. Soc. (n. ser.) 

 V, p. 414. — Green River, September. 



S. hidrophilus, Nutt. 1. c. — Valley of the Salt Lake. 



S. Hookeri, Torr. and Gray, Fl. 2, p. 438.— Weber River, 

 May 16. Scales of the involucre with black villous tips. 



Tetradymia Nuttallii, Torr. and Gray. T. sjnnosa, Nutt., 

 1. c. — Shore of the Salt Lake, May 5. A tborny shrub, about 

 four feet high. 



Cirsium undulatum, Spreng. — Stansbury's Island, Salt Lake. 

 Fl. June 24. 



SrEPHANOMERiA runcinata, Nutt. in Trans. Amer. Phil. Soc. 

 7, p. 427. — Carrington's Island, Salt Lake. 



