EXPLANATION OF PLATE 9 

 Oenothera ovata Nutt 



Figs. 7-15. Corollas from as many different plants. 



Fig. 16. Calyx cup opened, with lobes and stamens cut off to show the 

 hairy base of the style and the ring of hairs near the bottom of disk. 



Figs. 17-18. Ovaries, broken above seeding part. 



Fig. 19. Medium-sized root sliced lengthwise and cut across. 



Figs. 20-21. Buds. 



Figs. 22-23. Forms of ovaries. 



Figs. 24-26. Comparative sizes of stigmas and length of style. 



Fig. 27. Stamen from inner row. 



Fig. 28. Stamen from outer row. 



Fig. 29. Dorsal and ventral views of seed. X 



Fig. 30. Embryo. One cotyledon pushed slightly aside to show indistinct 

 radicle. X 



Fig. 31. Pollen. X 



All of natural size excepting seed, embryo, and pollen. 



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