Root
Nodule
Bacteria
and
Nonlegumes - There are about 10 genera of nonlegumes which form root nodules.
These
are
as
follows:
Coriaria
(Coriariaceae),
Myrica
(Myricaceae),
Alnus
(Betulaceae),
Casuarina
(Casuarinaceae),
Hippophae,
Shepherdia
and
Eleagnus
(Eleagnaceae),
Ceanothus
and
Discaria
(Rhamnaceae),
and
Trema
(Ulmaceae).
The
microbes
in
nodules
are
interpreted
as
actinomycetes
on
morphological
grounds.
The
microbe
in
nodule
of
Trema
aspera
is
shown
to
be
Rhizobium
species.





