Keys to plant families
There is an excellent plant family identification key available on the internet which you can use to key out your plant specimens to family level. This is a key to all Malesian plant families (SE Asia to New Guinea). Another useful website to key out plant families is found at the plant systematics website.

I follow the latest APG family classification, which might differ from the families given in the above site. To check the current APG family names follow this link: Angiosperm Phylogeny Website.