  The Schwinger Boson mean field theories of the `t-J' model are extended by
the consideration of anisotropic order parameters. This has two effects. First,
a collinear phase, in which the spins are anti-ferromagnetically aligned in one
direction and ferromagnetically aligned in the other, is found to be stable
over a significant range of the phase diagram. Second, the (1,1) and (1,0)
spiral phases become very close in energy. The inclusion of weak
intra-sublattice coupling may therefore stabilise the (1,0) spiral with respect
to the (1,1) spiral, thus harmonising theory and experiment.
