46 THE MONTANA EXPERIMENT STATION. 



76. LUPINUS PUSILLUS, Pursh. Dwarf Lupine. 



A small bulbous-rooted perennial, less than a foot high, with 

 a long-stalked seven-foliate leaf and spike-like racemes of blue 

 flowers, frequent in sandy soil in the Yellowstone and Milk River 

 regions, and often troublesome in grain fields and cultivated 

 ground. Native. 



77. LUPINUS SERICEUS, Pursh. Lupine; Prairie Beans. 



A native perennial common in dry ground throughout the 

 state. Like the last but larger, one to three feet high. Persistent 

 with long, creeping rootstocks in new ground and difficult to ex- 

 terminate except by digging or long cultivation. 



78. LYGODESMIA JUNCEA, Don. Wild Asparagus; Skele- 

 ton-weed. 



A slender-stemmed branching native plant, one or two feet 

 high, apparently leafless, with purplish flowers and long penetrat- 

 ing rootstocks, often troublesome i 

 region east of the Divide. [Fig. 13.] 



ing rootstocks, often troublesome in cultivated ground in the 



79. * MADIA FILIPES, Gray. Small Tarweed. 



A small, slender Pacific Coast tarweed, which has reached our 

 borders along the railways in the western part of the state. Well 

 established in waste places about Troy, Libby and Thompson 

 Falls. Annual. 



8o. MADIA GLOMERATA, Hook. Tarweed. 



Another Pacific Coast annual similar to the last but much 

 larger, about two feet high, with sticky, ill-smelling herbage and 

 terminal clusters of inconspicuous flowers. In waste places, pas- 

 tures and along roadsides eastward as far as Bozeman and ap- 

 pears to be rapidly spreading eastward in the state. 



81. "MALVA PARVIFLORA, L. Running Mallow. 



A small annual European mallow, noted in waste places about 

 Conrad on the G. F. & Can. Ry. (R. S. Williams), Thompson Falls 

 and Plains. 



