Finding the right Genus
In this particular case the Key to Families took you straight to the genus. That is usually not the case. Normally, you would be taken to a key to genera within a specific family. You can navigate to that key from the genus page, if you want to.
On the page for the genus, there is
1) a link to both a description for the higher taxonomic level (in this case, the family) and a dichotomous key for that family.
2) a general description of plants in the genus
3) a link to a key to species within the genus (below the genus description), then
4) a drop-down menu with a list of species in that genus.