Question: phase portrait

Hi all I'd like to construct a phase portrait of a DE system with several different solutions on one plot. To do this I've been using odeplot for each solution and then displaying each plot with display(). Now I'd like for there to be arrows on each solutions, resulting in a phase portrait which will show the direction of phase flow for each orbit, but I couldn't find a way to add arrows to each individual plot. Is there a way to do that ? If not, is there a different approach to achieve this kind of phase portrait ? Thanks LR
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