1914) 
GATES—SOME (ENOTHERAS FROM CHESHIRE AND LANCASHIRE 389 
both the broad or normal type (pl. 20 fig. 5) and the elliptica 
variety (pl. 20 fig. 4). The latter had a number of flowers with 
elliptical petals and it also had a different method of branching. 
Plate 21 fig. 12 is representative of a uniform F, culture of 49 
plants of the variety elliptica. This photograph is taken on a 
larger scale, and the nodding of the stem is merely due to wilting. 
This differs from typica (pl. 20 fig. 5) constantly in having nar- 
rower leaves and short branches, as well as in the occasional 
elliptical flowers which appear to be largely under environ- 
mental control. 
The variability of this race is therefore as interesting as are 
the features, such as the general bud and leaf characters, in 
which it is constant. The fact should also be mentioned that a 
lata-like mutant, doubtless having 15 chromosomes, appeared in 
the Е, generation, and also a mutant resembling (Е. mut. albida. 
СЕ, RUBRINERVOIDES 
This race resembles Œ. mut. rubrinervis in many features, 
and yet differs from it constantly throughout. I have pre- 
viously referred to this Birkenhead race as No. 25 (Gates, '11, 
p. 350) and studied the variation of the red stripes on the buds. 
In all, 1968 plants of this race have been grown in the years 
1909-1912, so that four generations of offspring from a single 
individual have been cultivated. An illustration of that indi- 
vidual has already been published (Gates, 712, pl. 3). One fam- 
ily of offspring was grown in 1909, two in 1910, eight in 1911 and 
nine іп 1912. Usually the variability of families progressively 
decreased, since each family was derived from the selfing of 
one individual of the previous generation. Тһе discussion of 
the precise ancestry of this race is of course out of the question, 
but its characters bear nearly though not quite the same rela- 
tion to the Œ. Lamarckiana from this region that the Lamarck- 
iana and rubrinervis of de Vries's cultures bear to each other. 
The 1909 family, or F;, numbered 111 plants. Plate 21 fig. 8 
shows one of these as а rosette. Тһе leaves are narrower and 
more pointed than in mut. rubrinervis, and nearly smooth. 
About 20 of the plants in this culture omitted the rosette stage 
altogether and shot up a stem directly from the seedling stage 
(pl. 20 fig. 7). A normal mature plant of this family is shown 
3 
