ON TRIPLE HYliRIDS. 



499 



which was sown the next spring. From it arose 36 laetQy 21 velutina, 

 15 scintillans, and one lata, altogether 73 plants, most of which 

 flowered during the summer. The laeta and velutina agreed with 

 the description given above; the lata was a mutant. The scintillans 

 were intermediate hybrids, which had the habit and leaves of the 

 mother parent, or nearly so, but small flowers with the anthers 

 surrounding and touching the stigma like the father. I fertilized all 

 three forms with their own pollen and intend to sow the seed next 

 year. 



Oenothera lata x strigosa. — This cross was effected in 1905, both 

 parents being annual specimens. I used different plants of lata and 

 sowed the seed of one cross in 1906, of another cross in 1907, and a 

 third lot in 1908. I got the following results: 



Total 



358 



40 



33 



27 



The laeta and velutina were the same as those from the cross with 

 Lamarckiana. 1 sowed self-fertilized seed from plants of 1906 in 

 1907; the mothers were ve/ufina and gave 113 children, most of which 

 flowered. All of them were velutina. In 1907 I self-pollinated some 

 laeta and some velutina and got 80 and 45 seedlings respectively. 

 The first were all laeta, the second lot was uniformly velutina. Of 

 each lot 25 specimens were preserved after the sorting period and 

 observed during the time of flowering and ripening of their fruits. 

 The lata were intermediate between 0. lata and 0. strigosa. In 

 1908 I cultivated one half of them in the open and the other under 

 an open glass-covering, both of them with cultures of ordinary lata 

 under the same conditions for comparison. The lata from the 

 strigosa cross had narrower leaves but with the rounded tips; the 

 bracts were broad but less bent downward. The flowers were much 

 smaller than those of the mother, but somewhat larger than those 

 of the father. Their shape resembled that of 0. strigosa, but the 

 stigma showed, although in a lessened degree, the peculiar hand- 

 shaped form of the ordinary 0. lata. The anthers touched the stigma, 

 but only with their lower halves. The flower buds were broad, and 

 the tube was relatively short. In all these points and in the other 



32* 



