Bull. 23, Biological Survey, U. S Dept. of Agriculture. 
* € « $ 
Plate II. 
<t C 
• If 
• •• i 
Seeds of Certain Troublesome Weeds Eaten by Horned Larks. 
:. A.— Green and yellow foxtail [Chaetochloa riridto and C. glnuca I - B Amaranth 
(Amaranthm blitoides). Pig. C— Sedges I. ' •.,■■• us; 2, Scirpus: 3. Cnn I R <,//<•//<»- 
spora). Fig. D. — Bar clover (Medicago denticulata) . Fig. E.— Napa thistle ( Gro/aMrrn 
melitentis). Fig. F. — Corn cockle Agrottemma gith<n -Button weed ( Diodia 
Fig. 
spurn . 
melitensis). Fig. F. 
[A. F. <;. Magnified » times; <'. I». K. magnified twice; B, magnified IT times.] 
