The Geography of Phytochemical Races

44 2 Examples Within Continents
2.3.10 Three Examples from Finland (Fig. 2.25)
The fi rst example involves a study of triacylglycerols accumulated by members
of two genera, Rubus (Rosaceae) and Empetrum (Empetraceae) in Finland. Rubus
chamaemorus L., the “cloudberry,” and Empetrum nigrum L., the “crowberry,”
were collected throughout Finland by Johansson et al. (1997) and examined for
their constituent seed oils by GLC. [Both E. nigrum, the “northern crowberry,” and
E. hermaphroditum Hagerup, the “southern crowberry,” were collected without distinction
for this study.] Seventeen sites were sampled, representing the latitudinal
and longitudinal ranges 60.5–69.5°N and 22–29°E, respectively.
Seeds of Rubus chamaemorus from southern Finland were heavier than the seeds
from the north, but had lower oil content; there was no difference in M r distribution of the
Fig. 2.25 Map of Finland
and Estonia for examples
including Rubus, Empetrum
and Pinus sylvestris