The directions of the group-velocity vectors of waves of various frequencies in a warm-electrons only plasma are given. Some important properties of the direction of group-velocity vectors are revealed. It is shown in particular that there is a plasma wave propagating near the resonant region of the wave in the corresponding cold plasma. The electron plasma wave can link with the ordinary wave or the extraordinary waves. This makes waves capable of propagating in a broader range of angles than in a corresponding cold plasma.