This is one of those cases where typing the names wouldn't work at all, Paul. Begonia semperflorens is a synonym for Begonia cucullata, so it would be best to type in the plant ID number (199100) for B. cucullata. If you mean Begonia x semperflorens-cultorum, typing that name wouldn't work either because we have dozens of entries with that name in the title, but the species entry has a plant ID number (86764).
I don't know the cultivar names of the petunias, heucheras, and marigolds in those photos, but typing the plant ID numbers for the generic Petunia (78235), Heuchera (232967), and Tagetes (242652) pages would produce tags.
Typing the numbers is so much easier because you don't have to worry about your spelling. Or just copy and paste the http address of the page you want in the box. Then you don't have to worry that you might transpose the numbers by accident.