EXPERIMENT STATION REPORT 293 



In the first generation, the total number of standard plants is 

 6, dwarfs 7, medium 15 or about one-quarter like either parent 

 and one-half intermediate. Also, the total number of pure red 

 like the red parent is 6, light red (including one with white 

 throat) is 15, and where the pure white is more or less abundant, 

 is 7, which also represent one-quarter like either parent and one- 

 half intermediate. Thus, the figures in the first generation, 

 together with those of the blend generation, indicate that dwarf 

 and standard sizes in snapdragons are antagonistic una, conform- 

 ing to Mendel's law, but with the red and white colors the uni- 

 formity is not clear for the red color prevails in the pure white 

 offspring of the first generation. These crosses illustrate a quick 

 method of securing plants of different sizes without changing 

 the color of flower, thus a dwarf red was obtained and, similarly, 

 a tall white (which, however, was not purely white), thus giving 

 a standard and dwarf of both the red and white colors. 



HYBRID FOXGLOVES. 



Digitalis purpurea, L., a biennial cultivated species about three 

 feet high with rugose, somewhat downy leaves, bearing bell- 

 formed, purple flowers about two inches long, was bred upon 

 D. lanata Ehrh., a perennial also differing from D. purpurea in 

 the size and color of flowers, which are whitish, only one inch 

 long, and in the texture of leaf, which is smooth having a sim- 

 pler system of venation. 



The general appearance of the hybrid was more like that of 

 D. lanata; the flowers, however, were a half an inch longer than 

 in this, or exactly intermediate to both parents. The color of 

 flower is more like D. lanata, but the lip had a trace of purple 

 showing the blood of the D. purpurea. The general appearance 

 of the leaves is also similar to D. lanata, but they are larger than 

 those of either parent, showing greater vigor and the texture of 

 the leaves, as well as surface character, is somewhat intermediate 

 to both parents. The hybrid developed capsules but they were 

 without normal seeds. 



NUMERICAL STUDY OF THE SEED-VESSELS OF THE 'VeLVET-LEAF.'' 



The ''Velvet-Leaf" or "Butter-print" (Abutelon Abntclon L.) 

 is a common weed of the mallow family and a near relative of 

 the "Cheeses" (mentioned later) and with a somewhat similar 

 fruit — that is, the seed-vessels are arranged in a circle around a 



