Fruit (mericarp) morphology of nine
species from section Platygalium of the genus Galium
from Russia were examined with light microscope
and scanning electron microscope (SEM). Macro- and
micromorphological characters, including fruit shape,
size, and types of mericarp surface and indumentum are
presented. Three types of mericarp surface were observed,
glabrous, hairy with either hooked or straight hairs and
tuberculate. The results agree with those of Pobedimova
(1958), who classified the section Platygalium into three
series. The mericarp characters also appear to be useful
for species delimitation in this group.