Since nearly a year this field full of Wild Carrots (Daucus carota) is a truffle field. Last winter the farmer planted young oak trees grafted with mycelium of the precious truffle mushroom. To protect the young trees from hungry roe and deer he covered them in plastic webbing. Long ago, when Perigord still was a wine region, the field has been a vineyard, and later on tobacco was grown on it, until the seventies or eighties of last century. And after that, the field has been left fallow and was overgrown with junipers for years.
The farmer has cleaned up and plowed and the seeds, hidden in the earth for long years, came to the surface. They are the seeds of 'weeds' that grew in the vineyards and tobacco fields, sometimes species that became rare since. Now they found a soil loose enough to germinate.
For this reason you can find exceptional annual 'weeds' in this new truffle field. Like this small Cut-Leaved Germander (Teucrium botrys) with laciniated slightly velvety leaves. 
This one has no upper lip and its stamina stick out, just like other gamanders