stout: pollinations in cichorium intybus 



365 



the seedlings were grown in pots in a greenhouse until spring, 

 when they were planted in the field giving sixty-six plants, twenty- 

 seven of which were from seed of the plant A. 



In order to secure blue-flowered plants of a decidedly distinct 

 strain from that of wild plants growing in the vicinity of plants A, 

 B, and C, there were also grown in 191 2 twenty-nine plants of a 

 cultivated variety, the seed of which was obtained from J. M, 

 Thorburn and Company (No. 4300, Catalogue of 1911) and which 

 had been grown by the firm of Ernst Benary of Erfurt, Germany. 

 The variety w^as the unimproved "common" chicory grown in 

 various parts of Europe for salad. These plants are designated 

 as the E series. Besides being blue-flowered, the plants of this 

 series were decidedly more robust than the plants of the wild 

 strains. The latter were from 2 34 to 3 feet tall and were, as a 

 rule, scraggly. The plants of the cultivated strain were from 

 5 to 63/^ feet tall and possessed many more leaves and branches. 

 Both the wild and the cultivated strains exhibited wide variations 

 especially in the shape of the leaves and in the amount of red 

 coloration. 



In the summer of 191 2, various crosses were made between 

 plants A, B, C, Ej, and E22 using the depollination method 

 described by Oliver ('10). These plants together with about 

 thirty others were self-pollinated. The crosses, which involved few 

 individuals, were successful (see table 2), but the self-pollinations 

 of that year failed in every instance. - * i ^JJ^ '^^ \ 



TABLE I jA f 



Data for plants fully self-sterile %\'^ 



^ Six seeds: evidently by experimental error. 



