638 



WEED FLORA OF IOWA 



Fig. 501A II 



Fig. 501A I 



Fig. 501-A. I. Chicadee carrying fruit. II. Berries of Horse Nettle ; carried 



by birds. 



Fig. 502. Mixture of weed seeds commonly found in low grade Alsike Clover 

 seed : a, Alsike Clover ; b, White Clover ; c, Red Clover ; d, Yellow Trefoil ; 

 e, Canada Thistle ; f, Dock ; g, Sorrel ; h, Buekhorn ; i, Rat Tail Plantain ; 

 k, Lamb's Quarters ; 1, Shepherd's Purse ; m, Mayweed ; n, Scentless 

 Camomile ; o, White Campion ; p, Night-flowering Catchfly ; q, Ox-eye Daisy ; 

 r, Small-fruited False Flax ; s, Cinquefoil ; t, two kinds of Peppergrass ; 

 u, Catnip ; v, Timothy ; x, Chickweed ; y, Canada Blue Grass ; z, Clover 

 Dodder ; 1, Mouse Ear ; 2, Knotgrass ; 3, Tumbling Amaranth ; 4, Rough 

 Amaranth; 5, Heal-all; 6, Lady's Thumb (enlarged). 

 (Hillman, U. S. Dept. Agr.) 



