198 AMERICAN MIDLAND NATURALIST. 
f 
Salix Bebbiana, candida, cordata, discolor and petiolaris, the 
S 
Greene, peeping out on April 18th, and two or three days later 
Potentilla concinna and Lomatium orientale never fail to pre- 
sent themselves, the latter being synchronous with Cymopterus 
acaulis and Lomatium villosum in the western part of the 
state. Now enter in quick succession Viola Nuttallii on the 
n excursion on the 23d of April resulted in the following 
finds: Phlox Hoodii, Lesquerella Lunellii (maybe the most love- 
ly looking plant of the genus, and at this time west of the 
divide replaced with L. montana), Orophaca caespitosa and 
Carex filifolia, all of these plants preferring the summits or 
the slopes of the hills, while Antennaria campestris loves the 
damp meadows, Plantago eriopoda chooses the whitish, alka- 
line low-land, and the holy grass, Savastana odorata, as the 
first-born of its family, gives a faint idea how magnificent the 
prairie will look when it becomes green at last. 
Another excursion was made to Butte, on the 30th of April, 
which added the following plants to the spring flora: Amel- 
A. occidentalis), Nothocalais cuspidata, Thalictrum thyrsoid- 
eum Greene, Astragalus crassicarpus, Fragaria glauca and 
Aragallus dispar. 'The last named plant is local for Butte, 
and transforms this place on the high hills into a veritable 
of gorgeous colors, from white, cream color, ochroleucous, light 
and dark blue, to light and dark rose purple, surpassing in 
. their diversity all other plants of this. state and probably of 
. Of introduced plants these pariahs of the vegetable king- 
dom always unwelcome, undesirable hangers-on, nuisances in 
the path of civilization, weeds in the fields and around the rail- 
"e way stations, along the streets and in the yards of our cities, 
~ . Where they supplant the native herbs, as weeds often becoming 
