OP ARTS AND SCIENCES. 869 



segments linear and entire or cleft into short linear lobes; scape 

 slender, 4 to G inches high, much exceeding the leaves ; rays of the 

 umbel short (1 to 4 lines) ; involucels of several linear-lanceolate 

 bracts: flowers white: fruit nearly sessile, 1| or 2 lines long; the 

 wings thin, but somewhat corky, narrow ; vittte 3 or 4 in the rather 

 broad intervals. — In the Rocky Mountains south of Virginia City, 

 Montana, by Prof. Hayden in 1871 {C. fceniculnceus); on a ridge 

 above Bannock City, S. W. Montana, Watson in 1880, and on Mount 

 Helena, Montana, TV. M. Canby in 1883. Resembling C. alpinus, 

 which is glabrous and more dwarf, the scape scarcely exceeding the 

 leaves, and the fruit with very thick corky wings. 



Peucedanu.m Suksdorfii. Very stout and tall (2 to 3 feet high 

 or more), glabrous : leaves very large, decompound, the segments 

 linear, 1 or 2 inches long, entire or mostly 2-3-cleft toward the top: 

 rays 2| to 5 inches long: involucels of numerous (6 to 12) linear 

 acuminate bracts : flowers yellow : fruit narrowly oblong, 9 to 14 lines 

 long by 3 to G broad, prominently ribbed, the large vittfe filling the 

 intervals. — On dry rocky mountain-sides, W. Klickitat County, AVash- 

 ington Territory; collected by W. N. Suksdorf, June and July, 1883. 

 Very remarkable among western species for the size of all its parts. 



Peucedanum IIowellii. Acaulescent, glabrous: radical leaves 

 biternate to biquinate, the leaflets cuneate-orbicular to round-cordate, 

 acutely dentate, often 3-lobed, 6 to 12 lines long: scape 12 to 18 inches 

 high : the fertile rays of the umbel few, elongated and divaricate ; 

 bracts of the involucel green, stout, acuminate-lanceolate : calyx of 

 sterile flowers prominently toothed: fruiting pedicels few, 4 lines long: 

 fruit broadly elliptical or nearly orbicular, 4 lines long; vittsc 3 or 4 

 in the intervals and 4 to G on the commissure. — Collected near Waldo, 

 Josephine County, Oregon, by Thomas Howell, June, 1884. Of the 

 P. Euriptera group. 



Angelica Dawsoni. Rather slender, 1 to 3 feet high, glabrous 

 or nearly so ; stem simple : radical leaves biternate, the lanceolate 

 leaflets 1 or 2 inches long, sharply and finely serrate, acute or acumi- 

 nate, the terminal one sometimes deepl}^ 3-cleft ; cauline leaves (1 or 2 or 

 none) similar: umbel solitary, conspicuously involucrate with numerous 

 foliaceous lacerately toothed bracts nearly equalling the rays ; involucels 

 similar: rays short (about an inch long): fruit glabrous, 2i lines long; 

 vittoe solitary in the intervals. — Collected by Dr. Lyall in 1861 in 

 the Rocky Mountains near the boundary, at G,500 feet altitude, and on 

 the slopes of the North Kootanie Pass by Dr. G. M. Dawson of the 

 Canadian Geological Survey in 1883. 



VOL. XX. (n. s. XII.) 24 



