
VULGARIS L. AND IN PH. MULTIFLORUS WILLD. 129 
clear enough; four groups may be found that are rather good in 
accordance with a 9:3:3:1-segregation: blackmarbled, blackuni- 
coloured, no-black-marbled; no-blackunicoloured are represented 
by 28: 14:9: 2 individuals, while a segregation according to 9: 3:3: 1 
would give as expectation 30:10:10:3 in a total of 53. It seems 
however to be useless to go further into details about such con- 
clusions, before more materials are available. 
12a. Cross oF BRUINE X WITTE. 
Four F;-plants were obtained by artificial hybridization: one from 
the white-seeded plant as mother, three from the brown race as 
seedparent. Besides four spontaneous hybrids were found in a 
culture of white-seeded plants and five others from a culture ot 
the brown race, and recognised from their manner of segregation 
to have been born as hybrids with white as pollenporent. Those, 
in total thus thirteen, F,-plants showed not only to have the same 
phaenotype, but also they segregated in their Fo-generations in one 
and the same manner, giving the same phaenotypically distinctive . 
groups, so that the genotypical identity of the Fy-individuals 
might be concluded to with rather great probability. The segregation 
resulted into the occurrence of nine phaenotypes: the first, I, had 
the same seedcoatpattern as the Fy-individuals, blackmarbled upon 
a yellowbrown ground-colour (pl. II. fig. 13); Il had a reddish brown 
marbling upon yellowish brown; II] had a grey-brown marbling 
upon a greyish white ground (pl. II. fig. 14, IV was yellow-brown- 
marbled upon a light yellow groundcolour (pl. II fig..15); as parallels 
to these four groups could be considered four others: V selfco- 
loured black (fig. 16), VI selfcoloured redbrown, VII selfcoloured 
grey-brown (fig. 17) and VII selfcoloured yellow-brown; as last a 
group (IX) of whiteseeded plants without coloured navelring. 
The distribution of the descendants among these nine groups 
results from the table given below; the good harmony between 
the theoretical suppositions and of the proportion observed of 
coloured: white (279: 87 with an expectation of 275: 91)is striking 
immediately. All white parents seem to have been of an aa-constitution 
and from this absence of the A-factor to have derived their white 
colour; relative to their ‚other genotypic factors, nothing can be 
said. Therefore, if the little numbers of each family allow a con- 
Genetica IV. 3 
