1913.] PUBLIC DOCUMENT — No. 31. 187 



In Table 2 arc given results from certain crosses that arc not 

 in accordance with expectation, in that deeper colored Howers 

 appear among the oll'spring than those possessed by either parent 

 variety. In the cross of Golden-eyed Wax X Burpee Stringless 

 there appear two })ink and one crimson llower in the F3 genera- 

 tion. These all occur among the progeny of a single selfed 

 plant having light ]nnk flowers. The pink-flowered plants bore 

 black beans, while the crimson-flowered plant bore dark mottled 

 beans. The significance of this correlation will be discussed a 

 little later. In the crosses of Burpee Stringless and Giant 

 Stringless with Keeney Rustless, pink flowers occur in both the 

 F2 and later generations, and in such numbers as to preclude 

 the possibility of errors in observation. Coincident with these 

 pink flowers occur black or dark mottled seeds, and coincident 

 with the white flowers appear eyed beans, a character coming 

 from the eyed parent, Keeney Rustless. The cross of White 

 Marrow X Golden Carmine presents a variety of surprises hard 

 to comprehend. As will be sho^vn later, this is common with 

 the White Marrow. It is most undependable in its behavior in 

 crosses. It is evident that some of this is due to a mixture 

 of strains which may be alike in external appearance but behave 

 dift'erently in crossing, but there are other abnormalities shown 

 that will bear much investigation. The reciprocal crosses of 

 Warwick and Creaseback show pink flowers, again coincident 

 with black pigmeiit in the seed coat. It is evident that Crease- 

 back carries a factor that blackens any pigment it may en- 

 counter, at least so far as our experience goes, and this black- 

 ening is accompanied by pink flowers. None of the pink- 

 flowered plants have bred true to flower color. All seem to 

 be heterozygous. 



