WEEDS OF MONTANA 



Rumex crispus, L "Curly-leaved Dock," frequent 



Rumex salicifolius, Weinm "Willow-leaved Dock." 



Salsola Kali Tragus, Moq "Russian Thistle." 



Sisymbrium incisum, Engelm "Tansy Mustard." 



Sisymbrium officinale, Scop "Hedge Mustard," infrequent. 



Solatium rostratum, Dunal "Buffalo Bur," infrequent. 



S. triflorum, Xutt "Wild Potato," common. 



Taraxacum officinale, Weber "Dandelion," common. 



Tragopogon porrifolius, L "Salsify," infrequent. 



Urtica gracilis, Ait "Stinging Nettle," frequent. 



Verbascum Thapsus, L "Mullein," in some localities common. 



Verbena bracteosa , M ichx "Vervain. " 



Xanthium Canadense, Mill "Cuckle-bur," infrequent. 



II. Weeds of Lawns, Meadows and Pastures. — These are 

 usually perennial and are obnoxious because they are not only 

 unsightly, but tend to crowd out the more desirable grasses. 

 The seeds of many of these are wind disseminated; some appear 

 to come in with the seed sown. In hay fields they materially 

 injure the quality and selling power of the product. 



Achillea Millefolium, L "Alillfoil, Yarrow." Common. 



Cnicus eriocephalus, Gray In mountain meadows. 



Cnicus undulatus, Gray "Thistle." Common. 



Grindelia squarrosa, Dunal "Rosin Weed." Common in pastures. 



Hordeum jubatum, L "Foxtail Grass." Common in low ground. 



Lepachys columnaris, T. & G "Coneflower," pastures. 



Plantago Patagonica gnaphalioides, 



Gray "Woolly Plantain." Pastures. 



P. major, L "Plantain." Troublesome in lawns. 



Kumex Aeetosella, L "Sheep-sorrel." 



Taraxacum officinale, Weber "Dandelion." Frequent in all situations. 



III. Weeds of Gardens and Cultivated Grounds —These 

 are the pests against which the farmers wage incessant war- 

 fare, as they tend to crowd out the cultivated plants. By 

 far the greater part of these are annuals, probably importations, 

 recent or remote. Seven are perennials with long creeping root- 

 stocks, all native species (the Canada thistle excepted), while 

 two are often biennials. 



A. ANNUALS. 



Amarantlms albus, L "Tumble-weed." Abundant in loose soil. 



A. blitoides. Wats "Pierweed-Pursley." Common with the last. 



