328 Nutrition and Selection. 
numerous bifoliate ones. Pinus Pinaster exhibits the 
same phenomenon. In different years the frequency of 
its occurrence varies greatly. 
Camellia japonica with striped flowers, is striped 
mainly in November and December; but if it flowers 
in April, it produces only self-colored ones. 1 A form 
of Trifolium repens produced pitchers in my garden al- 
most every year in no inconsiderable numbers and in 
great variety of forms. But they never occurred except 
in the spring; 2 just as the lime bears its pitchers chiefly 
on the first leaves of the branches and Saxijraga crassi- 
folia on the lower abbreviated and leafy part of the 
flower peduncle. 3 Ulinus campestris, on the other hand, 
forms its pitchers chiefly from the strongest leaves in the 
middle and upper part of the branches. 
It is in this middle region of the branches that anom- 
alies are most commonly found, either exclusively or 
chiefly. Thus FRITZ MULLER describes a Begonia from 
Brazil, of the height of a man, which bore little append- 
ages at the base of the leaf blade, 4 which were usually not 
more than 1-3, and sometimes from 5-50 mm. long. 
They were only found on the fourth to the tenth leaf, in 
one case from the second to the fifth leaf, of the upright 
stem; and occurred at the same height on every anom- 
alous stem, both in the garden and in the field. 
In May 1890 I observed a group of Epilobium hir- 
sutum, the numerous and still young stems of which 
were for the most part forked. These divisions occurred 
always about the same height and did not recur during 
'VERLOT, loc. dt., p. 67. 
2 J. C. COSTERUS, Bekertjes aan de eindblaadjes van Trifolium 
repens. Botan. Jaarboek, Gent, 1892, p. 13, PI. I. 
' T. TAMMES, Kon. Akad. d. Wetensch., Amsterdam, 1903. 
4 FR. MULLER, Ber. d. d, Ges., Vol. V, p. 44. 
