ZUNl AND COLORADO RIVERS. 163 



Zinnia grandiflora, Nutt. in Trans. Amer. Phil. Soc. (n. ser.) 7, p. 348 ; Torr. 

 and Gr. Fl. 2, p. 28 ; Torr. in Emory's rep., p. 144, t. 4. Rio Zuiii and on the 

 Little Colorado; also on the Rio Laguna ; August, Octohor. 



Lepachys colwnnaris, Torr. and Gr., Fl. 2, p. 315. On the Zuiii mountain ; 

 August. 



Heliomcris mult [flora, Nutt. in Jour. Acad. Philad, (n. ser.) 1, p. 171 ; Gray, PI. 

 Fendl., p. 84. On Zuni and San Francisco mountain ; September, October. 



Helianthus lenticularis Dougl. in Bot. Reg. 1. 1265 ; Torr. and Gray, Fl. 2, p. 

 319. Little Colorado ; October. 



H. petiolaris, Nutt. in Journ. Acad. Phil. 2, p. 115 ; Torr. and Gr. 1. c. Rio 

 Laguna August. Var. foliis lineari-lanceolatis. With the preceding ; Septem- 

 ber 27. 



Helianthella unijlora, Torr. and Gr., Fl. 2, p. 334. Helianthus vnijlorus, Nutt. 

 in Jour. Acad. Phil. 7, p. 37. Bill Williams's river ; October. 



Achenia obovate-cuneiform, blackish, about 5 lines long and 2 wide, distinctly 

 winged, ciliate ; the intermediate squamellaj acute, lacerate, nearly half as long 

 as the persistent slender awns. 



Coreojisis cardaminmfolia, Torr. and Gr. , Fl. 2. p. 34G ; Gray, PI. Wright. 1, p. 

 108. Zuni, near the Pucbla ; September. 



Thelesperma gradle, Gray, in Kew Jour. Bot. 1, p. 352. Cosmidium gracile, 

 Torr. and Gray, Fl. 2, p. 250. Rio Laguna. Achenia strongly verrucose on 

 one side. 



Sanvitaiia MerH, Gray, PI. Fendl., p. 87, and PI. Wright. 1, p. 111. On the 

 Colorado ; September. The achenia are wholly awnless in all the specimens of 

 this collection. 



Ximenesia encelioides, Cavan. le. 2, p. GO ; Torr. and Gr. 2, p. 359 ; Gray, PL 

 Fendl., p. 87. Little Colorado and head of the Rio Laguna ; September, October. 



llardia aristata, Pursh, Fl. 2, p. 573 ; Torr. and Gr. Fl. 2, p. 3Gf>. On the 

 Little Colorado and Zuni ; September. 



Hymenopappus jlavcscens, Gray, PI. Fendl., p, 97. On the Zuni; September. 



Bahia oppositifolia, D. C. Prodr. 5, p. 656 ; Torr. and Gray, Fl. 2, p. 37G ; Gray, 

 PI. Fendl., p. 99. Trichophyllum oppositifolium, Nutt. Gen. 2, p. 167. On the 

 Zuni, near the Puebla ; September. A rare species, first detected by Mr. Nut- 

 tall on the Upper Missouri, and not found afterwards for more than thirty years. 



Riddellia tagetina, Nutt. in Trans. Amer. Phil. Soc. (». ser.) 7, p. 371 ; Torr. 

 and Gr. Fl. 2, p. 362; Torr. in Emory's report, t. 5. On the Rio Laguna and 

 P.io Zuni ; also along the Little Colorado ; August, October. 



.Ictindla Richardsonii, Nutt. 1. c. ; Torr. and Gray, Fl. 2, p. 381 ; Gray, PI. 

 Fendl., p. 101. San Francisco mountain; October. Rays 3-4 lobed. Pappus 

 nerveless. 



