THE GENERAL CHARACTERS OF SEEDS 



461 



Figure 323A 



S&£k 



Figure 323B 



Fig. 323. A. Evening Primrose (Oenothera biennis). A, different views of 



seed. B, cross section of seed. C, natural size. 



B. Water Hemlock (Cicuta maculata). 



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



Wild Parsnip (Pastinaca sativa L.). 



"Seeds", carpels one-quarter in. in length, thin, circular or 

 oblong; color light or dull yellowish brown; lighter conspicuous 

 margin, ribs brownish or reddish ; apex notched, with a conspicuous 

 remnant of the style ; oil tubes four, alternating with the ribs ; 

 inner face concave, with a central longitudinal ridge and one oil- 

 tube on each side. 



Wild Carrot (Daucus carota L.). 



Fruit one-eighth in. long, oblong, flattened dorsally; carpel with 

 5 slender, bristly, primary ribs bearing numerous spines, and 4 

 secondary wings; color whitish yellow; oil tubes one under each 

 row of spines, and two between the ridges of the inner face ; seeds 

 commonly found with spines broken off. In alfalfa and clover 

 seeds. 



