In left window the succulent plant families are listed alphabetically. Click on family link to open the Genus register, then click on Genus link to open the Species list.
If you click on Genus link in the Species list again, a complete genus data will be loaded. Expect a longer loading time in case if the genus contains a lot of species.
Move borders and set windows to size that buttons and data are visible.
On plant datasheets few of icons are used. Explanation can be viewed in Legend How to use it button).