  It is well known that phantom energy, which is characterized by the equation
of state $p=\omega\rho$, $\omega <-1$, can support Morris-Thorne wormholes
since it leads to a violation of the null energy condition. The purpose of this
note is to show that the converse is also true in the following sense: for a
typical shape function, the equation of state of exotic matter in the vicinity
of the throat is given by $p_r=\omega\rho$, $\omega <-1$, where $p_r$ is the
radial pressure. Some implications thereof are also considered.
