Lilligant is a pure Grass type, is the evolution of Petilil, and has one of the better Grass type designs in Unova, would actually say Lilligant is my 2nd favorite Grass design of Unova. However, Lilligant isn't quite as great in battles, but it's still decent, as it has a nice movepool & decent stats, I just find Lilligant's abilities pretty meh, but it can do good in a playthrough for sure. Anyways, Lilligant is a Grass type that I actually like, but at the point in the rankdown now where I prefer the other 21 over this, so that's why Lilligant got ranked here.
