370 



OHIO EXPERIMENT STATION: BULLETIN 175. 



Fig. 69. 



Yarrow. 

 [After Millspaugh.) 



366 Yarrow, Milfoil (P) Achillea Millefolium L. Fig. 69 will give an 

 idea of the appearance of this pest of the grass lands. It commonly grows 2 tc 

 4 feet in height and has many fern-like, much divided leaves and fiat clusters 

 of flowers having white or pink rays. It is 

 very frequent in lawns and by roadsides. An 

 unsightly, ill-smelliug plant, much too common. 



Seeds small, gray, somewhat wedge-shaped, 

 about 1-12 inch long. Frequent in seeds 



of timothy and clover in which they constitute 

 a very damaging impurity. Any seeds of 

 yarrow should cause the rejection of the seeds. 

 Destroyed by cultivation or by persistent hand 

 digging. At some points provision might be 

 made for the cultivation of unused roadsides to 

 rid them of this and other weeds. 



367 Hay weed, Dog's Fennel (A) *Anthemis 

 Cotula L. An acrid, ill-smelling annual, 

 shown in Fig. 70. This has leaves cut into 

 narrow segments and small heads of flowers 

 with yellow centers and white rays. A vile 

 weed introduced from Europe, abundant in waste places. The stock-runs 

 and yards are the favorite places for mayweeds. About them it flourishes, 

 usually, without hindrance. 



Seeds somewhat columnar, tapering to the 

 base, 1-16 inch long with from eight to ten rows 

 of warty projections extending lengthwise. 

 Frequent in the seeds of clover and grasses. 

 It should be cut or pulled up and destroyed 

 before the blossoms open. If the weed is per- 

 sistently mown, it will soon be reduced in 

 numbers. The mowing machine here, as with 

 ragweed, can be made serviceable. 



368 Corn=camomile (A or B) *Anthemis 

 arvensis L. This weed resembles mayweed 

 but is not ill-scented. It is capable of proving 

 a much worse pest upon the farm because it 

 invades wheat fields and meadows to their 

 great detriment. It 

 is beginning to be 

 found at various 



points and should be guarded against in the purchase 



of seeds. 



Its seeds resmble the preceding, but with a 



minute, scale border at the summit. Impurity of 



seed is the source of danger and seed scrutiny the 



means of prevention. It is worth while to pull this 



out of meadows, etc., by hand or to replow a new one 



that is badly seeded with the weed. 



369 Oxeye Daisy, White Daisy (P) * Chrysan- 

 themum Leucanthcmum L. The illustration, Fig. 71, 



will serve to show the characters of this vile weed. 



Its pretty heads of flowers with white rays and yellow 



centers are larger than those of any similar weed, 



while the cut-toothed, narrow leaves complete the 



Fig. 71. Oxeye Daisy, 

 essential characters. An introduced weed that has (After V«sey.) 



Fig. 70. Mayweed. 



[After Millspaugh .) 



