50 THE MONTANA EXPERIMENT STATION. 



96. PLANTAQO MAJOR, L. Plantain. 



A European perennial abundantly introduced in lawns, pastures 

 and waste places about Deer Lodge, Columbia Falls, Bozeman and 

 most of the larger towns and cities of the state. Like the dande- 

 lion, it is difficult to eradicate from lawns except by digging. It 

 should not be allowed to secure a foothold in a community. This 

 species is very difficult to distinguish from the one above, except 

 that it is smaller and more smooth, has shorter and more abrupt 

 spikes of fruit, central dehiscence of the capsule and a more 

 pestiferous habit of frequenting lawns, yards and waste places. 



97. PLANTAGO PATAGONICA GNAPHALIOIDES, Gray. 



RlBGRASS. 



A native annual of the plains region, frequent in dry ground 

 and with a decided tendency to crowd out the grasses in pasture 

 land, when close cropped. The variety aristata, Gray, occurs with 

 the other form but is much less frequent. This has been quoted as 

 a weed from this state, but has value as a forage plant. The seeds 

 of all these plantains becomes mucilaginous when wet, adhere to 

 everything they touch and so are easily transported in the mud of 

 passage. 



98. *POA ANNUA, L. 



A small annual grass from Europe, a few inches high in streets 

 and waste places at St. Ignatius, Columbia Falls and a few other 

 places in the state, but of no special importance. 



99. POLYGONUM AVICULARE, L. Knotgrass; Yardgrass; 



GOOSEGRASS. 



An introduced annual forming carpet-like patches in yards, 

 waste places, streets and along highways, often trailing for several 

 feet. It has a smooth, wiry stem, small leaves and inconspicuous 

 flowers. Common in beaten ground throughout the state; mainly 

 in the coarser, blunt-leaved form (P. littorale, Link.), though both 

 occur. 



100. POLYGONUM ERECTUM, L. 



An introduced weed very similar to the last, but is usually 



