3""' année. N" 5. Mai 1895. 



BULLETIN DE L'HERBIER BOISSIER 



AN ENUMERATION 



OF THE 



PLANTS COLLECTED BY M. E. PENARD 



IN COLORADO DÖRING THE SUMMER OF 1892 



BY 



N. L. BRITTON and Anna MURRAY VAIL 1 



INTRODUCTION 



Ail the plants included in this list belong to ihe flora of Colorado, and 

 tu the eastern slope of the Rocky Mountains. A very limited numher of 

 thein were gathered at the end of June, 1891, on the baren ground in the 

 vicinity of the small mining city of Pueblo, nol far from Ihe horders of 

 New Mexico. The few hours passed in this locality permitted only a 

 superficial observation of the flora, which is in every case more southern 

 in character than thaï of the other parts of Colorado. Sand abounds at 

 Pueblo, and with it, cacti, yuccas, and in gênerai rough, prickly, and 

 tough plants. It is probable that the neighbowring gorges are rieh in 

 interesting species. 



In June. and laler about the beginning of October, we made several 

 excursions near Colorado Springs (6000 ft.), al the foot of Pike's Peak. 

 Hère the prairie ends abruptly near Ihe red sandstone of the Rocky 

 Mountains; and the vegetable species are somewhat intermingled , a 



1 The collection hère enumerated was submitted to us for détermination bv 

 M. Win Barbey of Valleyres, Yaud (Switzerland). 



The séquence of families adopted is that of Engler und Prantl « Naturliche 

 Pllanzenfaniilien » and the nomenclature and form of citation of authors is in 

 accordance with the rules formulated by the Botanical Club of the American 

 Association for the Advancement of Science. 



bull. herb. Boiss., mai 189o. 15 



