474 



WEED FLORA OF IOWA 



*&% 



Y 



*■ 



Fig. 342. Speedwell (Vernonia peregrina). a, b, d, different views of seeds; c, 



seeds, natural size. 

 (After Hillman, Mich. Agr. Exp. Sta.) 



PLANTAGINACEAE, PLANTAIN FAMILY. 



Bracted Plantain (Plantago aristata Mx.). 



Seeds oval or oblong, back of seed convex with transverse ring 

 across the middle or nearly so, one-twelfth to one-eighth in. long; 

 inner face with white marginal ring, in center of inner face 2 pit- 

 like markings each surrounded by whitish area, giving appearance 

 of 2 rings, or 2 links of a chain. 



§ 





Figure 343A 



^ 



Figure 343B Figure 343C 



Fig. 343. Bracted Plantain (Plantago aristata). A, group of seeds. B and C, 



the convex and grooved faces, respectively. 

 (A, after Hillman, Bull. Nev. Agr. Exp. Sta. ; B and C, drawings by Char- 

 lotte M. King.) 



