48 THE MONTANA EXPERIMENT STATION. 



82. MALVASTRUM COCCINEUM, Gray. Wild Hollyhock. 



A small native perennial about six inches high, with divided 

 leaves, and brick-red flowers, not infrequent in waste places east- 

 ward, and often persistent in new ground; hardly large enough or 

 sufficiently abundant to be troublesome. 



83. HARRUBIUM VULGARE, L. Horehound. 



A white-woolly European perennial, one or two feet high, 

 with opposite, roundish leaves, and the flowers and fruit clustered 

 in the axils of the upper leaves. Seeds disseminated by the bur- 

 like calyx. This has been found to be one of the worst weeds in 

 Idaho and Utah, and is becoming very troublesome in streets, 

 roadsides and waste places along the railroad from Missoula west- 

 ward, but rare elsewhere in the sta+e. Coming in from the west. 



84. MATRICARIA DISCOIDEA, DC. Rayless Dogfennel. 

 A Pacific Coast annual resembling the dog-fennel (Anthemis 

 Cotula) and similarly ill-scented, but without the white rays and 

 much smaller. Frequent in streets and waste places and along 

 highways throughout the western part of the state. Introduced 

 from the west and rapidly spreading eastward. 



85. MELILOTUS ALBA, Lam. Sweet Clover; White Melilot; 



Honey Clover. 

 An annual or biennial, three to six feet high, frequent in many 

 places along irrigation ditches and in waste places, rjarticularlv in 

 the Yellowstone valley, where it has been found most troublesome. 

 Much resembles alfalfa, but is taller and more slender and has 

 white flowers, while its value as a forage plant is questionable. 

 It appears to grow best in alkali ground. Introduced from Europe. 

 Seeds appear to be scattered by water and in hay. 



86. *MELILOTUS OFFICINALIS, Willd. Yellow Melilot. 

 Like the preceding, but with yellow flowers. In waste places 

 at Helena (F. D. Kelsey), White Sulphur Springs (R. N, Suthcrlin), 

 and Miles City. Infrequent. 



87. riONOLEPIS CHENOPODIOIDES, Moq. Poverty Weed. 

 A native annual prostrate or ascending with green inconspicu- 

 ous flowers and abundant fruit; fruiting throughout the season. 



