250 BOTANICAL GAZETTE [march 



On account of the influence of pod type upon seed-weight and 

 abortiveness it follows that the relative seed-weight does not neces- 

 sarily determine the amount of abortiveness. For example, 

 2-ovuled pods bear seeds at their tips that are of the same weight 

 as those formed at the base of 3-seeded pods, but the relative 

 abortiveness is 1 1 : 40. 



Summary 



1 . The greatest viability in Henderson Lima beans is associated 

 with the seeds that are borne in the middle of the pods. 



2. Three-seeded pods make up more than four-fifths of the crop; 

 3-seeded and 4-seeded pods are more numerous in the second of the 

 two field harvests of ripe pods. 



3. Seeds from the middle of the pod produce a much larger 

 number of pods than do seeds from the base or tip. 



4. The heaviest seeds are produced in 3-seeded pods, and the 

 lightest in 4-seeded pods. 



5. The seed weights make a continuous rising series from the 

 base to the tip for all types of pods. 



6. The first harvest yields lighter seeds than does the second 

 harvest in each pod position. 



7. The seeds associated with aborts are heavier than are those 

 in full pods in each type of pod, and each position in the pod. 



8. The abortiveness is less in the first than in the second harvest, 

 and is least in the rows grown from seeds from the middle of the 

 pods. 



9. Abortiveness is chiefly in the basal position and decreases 

 regularly from the base to the tip of the pod. 



10. The position of the pod that yields the greatest weight of 

 seed is associated with the lowest percentage of abortiveness. 



