512 



ANNUAL, REPORT SMITHSONIAN INSTITUTION, 1908. 



maturity, be arranged in several groups, and in fact constituted 

 several possible species. One, scintiUans, was eversporting, and con- 

 tinuously and consistently gave rise to a variety of forms in its 

 progeny, which included the parent and its mutants. Another, lata, 



Fig. 3. — Oenothera (jigas, one of the mutants of O. Lamarckiana. A and B, leaves from 

 middle of main stem ; C, bract ; D, flower with petals removed ; E, petal ; F and G, leaves 

 from the rosette ; H, capsules. 



was imperfect and did not mature pollen, and hence was incajDable of 

 independent existence. Others were perfect and vigorous, both vege- 

 tatively and reproductively, and have been found capable of sustain- 

 ing competition with the parental type. Of these, rudrinerois grows 



