Given the way the PS behaves in negociations with its allies, with "take it or leave it" proposals, it's easy to understand Les Verts would refuse a proposal once in a while. The vagaries of a non-proportional parliament election. This row was more probably caused by PS's toughness than from any desire of the greens to go to a "neutral center" position.

And the French greens aren't only active in cities ; they have strong positions in the regions and European Parliament... (I think many here would like, say, Alain Lipietz, one of the Green MEPs)

Un roi sans divertissement est un homme plein de misères