452 



- ' %gfeD PtORA OF tOWA v 



Fio. 306. White Sweet Clover (.Melilotiia alba). A, a group of seeds. B, the 

 pods ; tlje central one without the calyx. C, the embryo. D, a group of 

 seeds alia, pods, natural Size. * ,, -i 



, ' '■ (After Hillman, , Bull. Nev. Agr. E!xp. Sta.) ... jP 



\j Yellow Sweet Clover {Melilotus officinalis (L.) Lam.)^ {h, 



Pods one-seventh in. in Ito^; rugose, mor^ evenly, transverselj 

 mrrinkled than in M. alba; seeds subspherical or elliptical to Mdney- 





''■' ^ '^ " ' ■ . ■ 



Pig. 307. Yellow Sweet Clover (Welilotus officinalis). A, seeds, B, pods; the 



ohe at the -right wiifioiif^the calyx, and showing the contracted Base. C, a 

 i. . view of a .seed in cross -seotionj showing cotyledons and cauliclE. D, a group 



of seeds and pods, natural size. 

 ■■'' ; (After Hillman, Bull.' Nev. Agr. Shcp. Sta.) "- 



shaped, one-twelfth to one-tenth in. in length, smooth ; yellowish or 

 brownish to greeilish;, with Siiiall micropilar processes. 



Bur Clover ^{MeMcUgo hispida Gaertn.). 



Seed^ kidney-shaped, occasionally sausage-shaped, both sides con- 

 vex, one-sixth in. in length, larger than alfalfa, variable in size; 

 color lighter than in alfalfa seed; scar about middle of seed, close 

 to prominent micropilar processes ; pods large, spirally twisted into 

 several flat coils, covered by pointedprojeetions; the prickles eithel" 

 straight or curved; each pod several-seeded; seeds have general re- 

 semblance to alfalfa seed in form and color. ^-. - -i 



