352 Literatur 



Vail, A. M., Onagra grandiflora Ait, a species to be included in the North American 

 flora. 



Torreya, Vol. V S. 9. 1905. 

 de Veies, Hugo, On atavistic Variation in Oenothera cruciata. 



Bull. Torrey Bot. Club, 1903 p. 75. 



Teuuisbloemen in Amerika. 



Album der Natuur. 1905. p. 193209. 



ber die Dauer der Mutationsperiode bei Oenothera Lamarckiana. 



Ber. d. d. bot. Gesellseh. Vol. 23 p. 382. 1905. 



On Twin hybrids. 



Bot. Gaz. Vol. 44. p. 401407. 1907. 



ber die Zwillingsbastarde von Oenothera naneUa. 



Ber. d. d. bot. Ges. Bd. XXVI a p. 667 676, 1908. 



Bastarde von Oenothera gigas. 



Ber. d. d. bot. Ges. 1908. Bd. XXVI a. S. 754762. 



n triple hybrids. 



Bot. Gaz. Vol. 47. p. 18, 1909. 



ber doppeltreziproke Bastarde von Oenothera biennis L. und O. muricata L. 



Biol. Centralbl. Bd. 31 p. 97104. 1911. 



Oenothera nanella, healthy and diseased. 



Science X S. Vol. 35 Nr. 906 S. 753. 1912. 

 Zeylstea, H. H., Oenothera nanella de Vries, eine krankhafte Pflanzenart. 

 Biol. Centralbl. Bd. 41 p. 129 138. 1911. 



Over de oorzaak der dimorphie by Oenothera nanella. 



Kon. Akad. v. Wet, Amsterdam 1910 S. 732737. 



On the cause of dimorphism in Oenothera nanella. 



Proceed Roy. Ac. of Sc. Amsterdam 1919. 



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