THE GBNERALi CHARACTERS OF SEEDS 



US3 



inc 



308. Bur Clover (Jfedicaffo hisptda). A, seed; B, 

 (Drawings by Ada Hayden and L. R. Collins.) 



pod. 



i3i.>,') j:^.' Yellow Tre£oir(Me<iica£fo .iMp«J*j«iL.). ■ 



Seeds kidney to egg-shaped, much shorter than bur clover seed, 

 one- twelfth to one-tenth. in. long; about the size of alfalfa, which 

 it ^jlosely resembles ; color yellowish, reddish, or greenish ; sear near 



Fig. 309. Teliow Trefoil (Medicago Vu/pulina.) . A, seeds showing the prevail- 

 ing forms. B, pods ; the central one with the calyx removed ; the one at 

 the left an inmiature, lighter colored specimen. C, a view of a seed in cross 

 section, showing cotyledons and caulicle. D, the embryo. E, seeds and 

 pods, natural size. 



(After Hillman, Bull. Nev. Agr. Exp. Sta.) 



r 



one end; micropilar processes prominent; the pods clustered at, the 

 end of the peduncle small, black, wrinkled, and coiled at tip, marked 

 by prominent veins and hairs ; each pod contains one j^eed. ) 



Dalea ( Z>aZea aiopeeiiroi^ies Willd.). 



Seeds triangular to kidney-shaped, one-tenth in. in length ; mi- 

 cropilar scar prominent,, with whitish border and 2 micropilar 

 processes; surface shining, slate-Colored. Pound in clover seed, 

 f rtim which it is separated with difficulty. 



