Oenothera Scintillans. 385 



OENOTHERA SCINTILLANS. 



INDIVIDUALS THAT HAVE ARISEN BY MUTATION. 



SOURCE YEAR ^°^^^ °^ O. SCINTILLANS P'^ODUCING 



SEEDLINGS RIPE FRUIT 



O. lata 1888 



I 1895 

 The Laniarckiana-ioimWy - 1896 



( 1897 

 Lateral branch of this family 1895 

 O. Lam. , a subsidiary culture 1897 



O. lata 1898 



O. lata X O. biennis . . . 1899 



As the last column of the table shows I only succeeded 

 in getting ripe fruits from five of these mutants, of which 

 four set seed in the second year (2) and only one in the 

 first ( 1 ) . The rest died as rosettes or at any rate be- 

 fore they fruited. The percentage composition of the 

 cultures raised from these seeds has already been given 

 on pp. 244-246, but will be described in greater detail 

 now. 



I shall begin with the oldest. It appeared in 1888 

 in the /a/a- family referred to on p. 288; it was biennial 

 and flowered luxuriantly in July 1889 but was left to be 

 fertilized promiscuously amongst a crowd of Lainarc- 

 kianas. It had all the characters which were afterwards 

 observed both in its offspring and in the other mutants. 

 I sowed its seed partly in 1890 partly in 1894 and ob- 

 tained, in both years, both annual and biennial plants. 

 The rosettes of 1894 flowered in 1895; the plants were 

 self- fertilized in parchment bags. There were 14 healthy 

 plants, bearing hardly any branches : their fruits were 

 small, and did not afford more than 1 to 3 cubic centi- 

 meters of seed per plant. The seeds were sown on sep- 



