24O WEEDS OF THE FARM AND GARDEN 



leaves petioled, three to five-divided, the stalked leaflets 

 lanceolate, pointed, coarsely toothed; rays small and 

 yellow; involucre double, outer foliaceous, longer than 

 the head; receptacle flattish, with deciduous chaff; 

 achenes wedge-obovate, two-awned, the awns down- 

 wardly barbed. Widely distributed in moist places 



throughout the north- 

 ern states ; often a very 

 troublesome weed in 

 gardens. Widely scat- 

 tered because of the 

 seeds adhering to 

 clothing, pelts of ani- 

 mals, etc. 



Tickseed (Bid ens 

 aristosa, (Michx.) 

 Brit.). A smooth, 

 somewhat pubescent 

 annual or biennial ; 

 leaves once to twice- 

 pinnately compound with 

 five to seven divisions; 

 Fig. 152. Meadow sunflower (Heli- i ea fl ets lanceolate; 

 ant /i us grosseserratus). 11- 11 



heads in ample clus- 

 ters; slender peduncles; outer scales not exceeding the 

 inner; ray-flowers conspicuous, golden yellow; achenes 

 cuneate, upwardly ciliate, crowned with tw r o erect, trian- 

 gular or awl-shaped, stout, upwardly or downwardly 

 barbed awns. From Delaware to Michigan, southern 

 Iowa, Missouri and Louisiana. 



Tarweed, California Tarweed (Madia californica, Mo- 

 lina). A glandular, more or less viscid, heavy-scented 

 annual, one to three feet high ; leaves linear or lanceolate, 

 entire or slightly toothed, the upper, at least, alternate ; 

 heads racemose or paniculate, often glomerate; ray flow- 

 ers five to twelve, yellow, disk flowers about the same 



