A. B. Stout 95 



produced fine capsules from nearly every flower that was self-pollinated 

 by hand (numbers were 58 and 183). In feebly or partially self- fertile 

 plants, as a rule, a small proportion of flowers produced pods, and these 

 were small and contained relatively few seeds ; seven of these were feebly 

 self- fertile from the first few days of bloom to the end of the blooming 

 period. 



For one plant, judged as partially self- fertile, pollinations were made 

 on 14 different dates for a total of 244 flowers of the main and three 

 lateral racemes. A total of 49 pods were produced and these were 

 scattered over the racemes from the first to the very last of the flowers 

 that were pollinated ; many pods had no seed and the highest number 

 for any pod was 18. 



The following is the record for one (No. 8) of these self-fertile plants. 

 The dates of pollination are given in italic, the number of self-pollinations 

 that failed is indicated by roman, and the number of flowers that produced 

 pods is given in bold face. The main raceme began bloom June 6, 2 flowers 

 not pollinated; 8th, 4-1-1; 10th, 9; 12th, 4-f-2; 13th, 4 + 3; 17th, 12; 

 19th, 8 ; 21st, 4 ; 25th, 3 ; 28th, 3 which were the last on the main stem : 

 for a large lateral branch from base of plant ; began bloom June 24th ; 

 25th, 7-1-3; 28th, 11; July 3rd, 9-j-l; 9th, 10; 13th, 6. The ninth 

 plant classed as self- fertile produced 13 pods out of 26 flowers pollinated 

 on first four dates, but gave not a pod in the 76 flowers self-pollinated on 

 later dates. 



Not a single pod was produced in the controlled self-pollinations by 

 any of the 58 plants judged to be completely self-incompatible. As 

 many as 288 flowers for a single plant were selfed and special effort was 

 made to continue pollinations in one or more lateral branches as well as 

 in the main branch until the last flower bloomed. One of these plants 

 had a second period of bloom. The main stem and its immediate 

 laterals bloomed from June 13 till Aug. 18. Later a branch arose from 

 among the rosette leaves which bloomed fi*om Sept. 14 until Oct. 4. 

 The flowers on this branch were all self-sterile. 



Every plant of this series was highly productive in pods when the 

 flowers were subject to free open cross-pollination by insects. Numerous 

 tests of the self-fertile plants by emasculation of flowers showed that 

 parthenocarpic fruits and apogamous seeds were not formed. 



Another series of 40 sister plants was grown jfrom seed of a plant 

 that was highly self-fertile from the first date of bloom. 



Twenty-four of these plants were almost completely impotent as males 

 hut fully potent as females. The stamens were contabescent, not a 



