280 



Shull. 



from the cal3'x-tube. The petals were of the usual type, broad, with an 

 apical cleft about one-third their length: stigmas long and very slender, 

 exserted from the ■corolla about 5 mm. (In typical M. album they are 

 usually included or nearly so, while in M. rubrum they are exserted). 

 Capsules nai-rowly conical, slender. Another remarkable feature was 

 the apparent absence of the absciss-layer, which, in most other strains 

 of Lychnis dioica, and especially in Melandrium album, causes the buds 

 and flowers to drop off or to be broken off readily. In Figure 4 this 



Fig. 5. Xarrow-leafed I'l'iiialu Xu. 1221(1 i2i. Nuinbert 

 are iuclies (1 inch = 2 5 cm). 



divisions on the rule 



plant is shown in coniiiarisou with (me ol' its narrow-leafed male sibs. 

 See also Fig. .5. 



That this peculiar i)lant represents a mutation of some sort, there 

 can l)e little doubt, I)ut its genotypic relationship with its sibs can not be 

 surmised. It may have been a sex-mutant from a narrow-leafed male 

 or a leaf-mutant from a heterozygous broad-leafed female, or something 

 independent of both. "Whether its characters are those which will be 

 found in narrow-leafed females, when the latter are produced by normal 

 segiegation and recombination, — as I have no doul)t they will be in 

 some futuie mating between heterozygous broad (X narrow)-leafed females 



