530 
K. EUGGLES GATES AND XESTA THOMAS. 
parts (see Gates^ 1913a, pi. iii, figs. 42, 43 left). The plants 
are also peculiar in habit, about half as high as L amarcki ana, 
having weak, more or less decumbent stems and sprawling 
branches. 
The typical se mil at a stands about midway between lata 
and Lamarckiana. Its leaves are more pointed and rather 
less crinkled than those of lata. The stem is erect and taller 
than lata, though shorter than Lamarckiana, the buds are 
less stout and more squarish than lata, and it produces a 
considerable quantity of pollen (see Gates, 1913a, figs. 43 
right and 44). 
Text-fig. 2 contrasts the stem leaves of lata (lower row) 
and semilata (upper row) as they appear in mutants derived 
from cultures of de Vries’s race of Lamarckiana. These 
two types from this source are remarkably uniform whenever 
they appear, but in some of the cultures from other sources 
they are much more variable, so that it becomes difficult or 
impossible to draw a line between lata and semilata. 
Uesceiptiox of Cultures. 
AVe may now describe the main features of the cultures in 
the order in which they are enumerated in Table I. Culture 
228 was derived from seeds sent by the kindness of N. 
Heribert-Xilsson from Sweden. They were descended from 
his pedigree cultures of a race of CE. Lamarckiana, found 
by him in a garden in southern Sweden, which differs in 
various features from the Lamarckiana of de Vries’s 
experiments. Komb. 6” of Heribert-Nilsson (see 1912, 
p. 128) most resembles CE. mut. rubriuervis, from which 
it differs, however, in certain features. Our culture of 
Komb. 6 X Lamarckiana” contained 120 plants, 110 of 
which belonged to the rubriuervis type, differing from the 
de AViesian mutant chiefly in having, for the most part, 
smooth leaves. The buds bore an extreme amount of red 
pigmentation for rubriuervis, i. e. the red colour pattern 7 
on the sepals, and reddish streaks on the hypanthium (see 
