Farmhouse ales include Saison and Biere de Garde.
There is a lot of misinformation out there about Saisons. Traditionally, Saisons were brewed during winter (so not at high ferm temps), highly hopped for long storage, low in abv, so that the farm workers could have a refreshing beverage during the summer.
Now today, it's quite the opposite, they ferment warm, and are higher in abv. And the ingredients are probably quite different than the saisons from yesteryear.
There's only a couple saison breweries in belguim and france now, and even those guys, have significantly changed their recipes over time. So I really think that Saison needs to be thought of as a newer style, as todays saisons are probably not good examples of what was brewed a 100 years ago in french belgium.
That's just my opinion, from what I've learned from my research.