[Vor. 1, 1914] 
396 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Gates, К. В. (14). Breeding experiments which show that hybridization and mutation 
are independent phenomena. Zeitschr. f. induct. Abst.— u. Vererbungsl. 11: 
209-79. f. 1-25. 1914. 
MacDougal, D. T., Vail, A. M., and Shull, G. H. (07). Mutations, variations, and 
relationships of the cenotheras. Carnegie Inst. of Washington Publ. 81: 1-92. 
pl. 1-22. f. 1-78. 1907. 
EXPLANATION OF PLATE 
PLATE 20 
Fig. 1. (E. multiflora, rosette, 1909. 
Fig. 2. (%. multiflora elliptica, rosette, 1911. 
Fig. 3. Œ. multiflora, full-grown plant, 1909. 
Fig. 4. (E. multiflora elliptica, 1912. 
Fig. 5. Œ. multiflora, 1912. 
Fig. 6. (E. multiflora, flowering shoot, 1909. 
Fig. 7. (Е. rubrinervoides, young plantlet showing absence of rosette, 1909. 
