ZUNl AND COLORADO RIVERS. 161 



COMPOSITE. 



Pedis angustifolia, Torr. in Am. Lye. Nat. Hist. N. York, 2, p. 62. Pecti- 

 dopsis angustifolia, D. C. Prodr. 7, p. — . On the Rio Zuni and on a mountain 

 between Acona and Laguna. August, September. 



Eupatorium ageratifolium, Torr. and Gray, Fl. 2, p. 90. 0. herbaceum, Gray, 

 PI. Wright. 2, p. 74. San Francisco mountain and Laguna Enematio, New 

 Mexico; October. Heads mostly about 20-flo\vered. 



Machccrantliera canescens, var. latifolia, Gray. PI. Wright. 2, p. 75. Dietcria 

 asteroides, Torr. in Emory's report. 



There are three forms of this species in the collection : 1, with several erect 

 stems, a eaudex, which bears a dense tuft of leaves, with the scales of the invo- 

 lucre slightly squarrose ; 2, with loose assurgent branches and strongly squarroso 

 involucrnl scales ; 3, with small narrow, nearly entire leaves. The first occurs 

 on San Francisco mountain ; the second on Yampai creek ; and the third along 

 the Colorado. October, November. 



Aster pauciflorus, Nutt. Gen. 2, p. 154. Torr. ;md Fl. 2, p. 164. Rio Lagu- 

 na; August. This species certainly perennial. 



A. angustas, Torr. and Gr. Fl. 2, p. 162. Tripolium angustum, Lindh. Dif- 

 fuse and branching from the root, which is annual' Rio Zuni, near thePuebla. 

 September. 



A. multiflorus, var. commutatus. New Mexico; October. This is one of the 

 smaller leaved forms. 



Erigeron macranthum, Nutt. in Trans. Arner. Phil. Soc. (n. ser.) 7, p. 310; 

 Torr. and Gray, Fl. 2, p. 173. Zuni mountain: August. 



E. delpliinifolium, Willd. Hort. Berol., t. 90; Gray, PI. Wright. 2, p. 77, with 

 the preceding; Laguna Enematio, &c. September, October. 



E. divergens, Torr. and Gr., Fl. 2, p. 175, Gray, PI. Wr. 1. p. 91. Laguna 

 Enematio; October. 



Toicnsendia strigosa, Nutt. 1. c. Gray, PI. Fendl., p. 70, RioZutfi; September. 



Guttierezia Euthamia>, Torr. and Gr. Fl. 2, p. 193. ZuiTi mountain; August. 



G. microcepkala. Gray, PI. Fendl., p. 74. RioZufii. The heads were mostly 

 two-flowered. 



Solidago mollis, Bartl. Gray, PI. Wright. 2, p. 79. S. intuitu, Torr. andGr., 

 1. c. San Francisco mountain; October. 



Lynosiris pulchella, Gray, PI. Wright. 1, p. 96. Little Colorado; October. 



L. depressa, Nutt. PI. Gamb. p. 171, (under Chrysothamnus.) Mountains of 

 New Mexico; September. 



The only specimen in the collection agrees exactly with the description of 

 Nuttall in the work quoted. Mr. N. is still of opinion that his Genus Chryso- 

 tkamnus ought to be retained. 

 11 



